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Finding the Fourth Proportional to 394,980.24, 592,531.80 and 128,678.76

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Solution

The fourth proportional to 394,980.24, 592,531.80 and 128,678.76 is: 193,038.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,980.24 : 592,531.80 = 128,678.76 : x
  2. Step 2: Convert to fraction form
    394,980.24/592,531.80 = 128,678.76/x
  3. Step 3: Cross multiply
    394,980.24x = 592,531.80 × 128,678.76
  4. Step 4: Simplify right side
    394,980.24x = 76,246,257,284.57
  5. Step 5: Solve for x
    x = 76,246,257,284.57/394,980.24
  6. Step 6: Final answer
    x = 193,038.16

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