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Finding the Fourth Proportional to 67,220.80, 100,831.20 and 27,806.20

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Solution

The fourth proportional to 67,220.80, 100,831.20 and 27,806.20 is: 41,709.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,220.80 : 100,831.20 = 27,806.20 : x
  2. Step 2: Convert to fraction form
    67,220.80/100,831.20 = 27,806.20/x
  3. Step 3: Cross multiply
    67,220.80x = 100,831.20 × 27,806.20
  4. Step 4: Simplify right side
    67,220.80x = 2,803,732,513.44
  5. Step 5: Solve for x
    x = 2,803,732,513.44/67,220.80
  6. Step 6: Final answer
    x = 41,709.30

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