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Finding the Fourth Proportional to 643,291.12, 887,782.02 and 371,408.86

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Solution

The fourth proportional to 643,291.12, 887,782.02 and 371,408.86 is: 512,567.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,291.12 : 887,782.02 = 371,408.86 : x
  2. Step 2: Convert to fraction form
    643,291.12/887,782.02 = 371,408.86/x
  3. Step 3: Cross multiply
    643,291.12x = 887,782.02 × 371,408.86
  4. Step 4: Simplify right side
    643,291.12x = 329,730,107,976.70
  5. Step 5: Solve for x
    x = 329,730,107,976.70/643,291.12
  6. Step 6: Final answer
    x = 512,567.48

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