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Finding the Fourth Proportional to 3,978.98, 5,490.03 and 2,386.11

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Solution

The fourth proportional to 3,978.98, 5,490.03 and 2,386.11 is: 3,292.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.98 : 5,490.03 = 2,386.11 : x
  2. Step 2: Convert to fraction form
    3,978.98/5,490.03 = 2,386.11/x
  3. Step 3: Cross multiply
    3,978.98x = 5,490.03 × 2,386.11
  4. Step 4: Simplify right side
    3,978.98x = 13,099,815.48
  5. Step 5: Solve for x
    x = 13,099,815.48/3,978.98
  6. Step 6: Final answer
    x = 3,292.26

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