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Finding the Fourth Proportional to 98,718.80, 148,078.20 and 92,109.20

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Solution

The fourth proportional to 98,718.80, 148,078.20 and 92,109.20 is: 138,163.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,718.80 : 148,078.20 = 92,109.20 : x
  2. Step 2: Convert to fraction form
    98,718.80/148,078.20 = 92,109.20/x
  3. Step 3: Cross multiply
    98,718.80x = 148,078.20 × 92,109.20
  4. Step 4: Simplify right side
    98,718.80x = 13,639,364,539.44
  5. Step 5: Solve for x
    x = 13,639,364,539.44/98,718.80
  6. Step 6: Final answer
    x = 138,163.80

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