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Finding the Fourth Proportional to 170,633.40, 255,623.70 and 91,721.40

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Solution

The fourth proportional to 170,633.40, 255,623.70 and 91,721.40 is: 137,406.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,633.40 : 255,623.70 = 91,721.40 : x
  2. Step 2: Convert to fraction form
    170,633.40/255,623.70 = 91,721.40/x
  3. Step 3: Cross multiply
    170,633.40x = 255,623.70 × 91,721.40
  4. Step 4: Simplify right side
    170,633.40x = 23,446,163,637.18
  5. Step 5: Solve for x
    x = 23,446,163,637.18/170,633.40
  6. Step 6: Final answer
    x = 137,406.65

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