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Finding the Fourth Proportional to 391,978.41, 588,026.08 and 139,237.75

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Solution

The fourth proportional to 391,978.41, 588,026.08 and 139,237.75 is: 208,877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,978.41 : 588,026.08 = 139,237.75 : x
  2. Step 2: Convert to fraction form
    391,978.41/588,026.08 = 139,237.75/x
  3. Step 3: Cross multiply
    391,978.41x = 588,026.08 × 139,237.75
  4. Step 4: Simplify right side
    391,978.41x = 81,875,429,229.60
  5. Step 5: Solve for x
    x = 81,875,429,229.60/391,978.41
  6. Step 6: Final answer
    x = 208,877.40

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