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Finding the Fourth Proportional to 394,870.47, 592,305.22 and 128,630.55

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Solution

The fourth proportional to 394,870.47, 592,305.22 and 128,630.55 is: 192,945.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,870.47 : 592,305.22 = 128,630.55 : x
  2. Step 2: Convert to fraction form
    394,870.47/592,305.22 = 128,630.55/x
  3. Step 3: Cross multiply
    394,870.47x = 592,305.22 × 128,630.55
  4. Step 4: Simplify right side
    394,870.47x = 76,188,542,611.79
  5. Step 5: Solve for x
    x = 76,188,542,611.79/394,870.47
  6. Step 6: Final answer
    x = 192,945.66

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