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Finding the Fourth Proportional to 13,831.97, 20,754.05 and 7,256.57

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Solution

The fourth proportional to 13,831.97, 20,754.05 and 7,256.57 is: 10,888.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.97 : 20,754.05 = 7,256.57 : x
  2. Step 2: Convert to fraction form
    13,831.97/20,754.05 = 7,256.57/x
  3. Step 3: Cross multiply
    13,831.97x = 20,754.05 × 7,256.57
  4. Step 4: Simplify right side
    13,831.97x = 150,603,076.56
  5. Step 5: Solve for x
    x = 150,603,076.56/13,831.97
  6. Step 6: Final answer
    x = 10,888.05

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