Finding the Fourth Proportional to 12,732.50, 17,571.12 and 7,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,732.50 : 17,571.12 = 7,143.50 : x
2. Step 2: Convert to fraction form
   12,732.50/17,571.12 = 7,143.50/x
3. Step 3: Cross multiply
   12,732.50x = 17,571.12 × 7,143.50
4. Step 4: Simplify right side
   12,732.50x = 125,519,295.72
5. Step 5: Solve for x
   x = 125,519,295.72/12,732.50
6. Step 6: Final answer
   x = 9,858.18