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Finding the Fourth Proportional to 428,221.44, 590,691.84 and 258,355.20

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Solution

The fourth proportional to 428,221.44, 590,691.84 and 258,355.20 is: 356,377.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,221.44 : 590,691.84 = 258,355.20 : x
  2. Step 2: Convert to fraction form
    428,221.44/590,691.84 = 258,355.20/x
  3. Step 3: Cross multiply
    428,221.44x = 590,691.84 × 258,355.20
  4. Step 4: Simplify right side
    428,221.44x = 152,608,308,461.57
  5. Step 5: Solve for x
    x = 152,608,308,461.57/428,221.44
  6. Step 6: Final answer
    x = 356,377.08

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