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Finding the Fourth Proportional to 12,978,844.60, 19,468,266.90 and 12,978,844.60

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Solution

The fourth proportional to 12,978,844.60, 19,468,266.90 and 12,978,844.60 is: 19,468,266.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978,844.60 : 19,468,266.90 = 12,978,844.60 : x
  2. Step 2: Convert to fraction form
    12,978,844.60/19,468,266.90 = 12,978,844.60/x
  3. Step 3: Cross multiply
    12,978,844.60x = 19,468,266.90 × 12,978,844.60
  4. Step 4: Simplify right side
    12,978,844.60x = 252,675,610,726,423.72
  5. Step 5: Solve for x
    x = 252,675,610,726,423.72/12,978,844.60
  6. Step 6: Final answer
    x = 19,468,266.90

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