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Finding the Fourth Proportional to 12,656.82, 18,984.69 and 3,891.36

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Solution

The fourth proportional to 12,656.82, 18,984.69 and 3,891.36 is: 5,836.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,656.82 : 18,984.69 = 3,891.36 : x
  2. Step 2: Convert to fraction form
    12,656.82/18,984.69 = 3,891.36/x
  3. Step 3: Cross multiply
    12,656.82x = 18,984.69 × 3,891.36
  4. Step 4: Simplify right side
    12,656.82x = 73,876,263.28
  5. Step 5: Solve for x
    x = 73,876,263.28/12,656.82
  6. Step 6: Final answer
    x = 5,836.87

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