Finding the Fourth Proportional to 12,540.57, 17,305.98 and 7,505.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,540.57 : 17,305.98 = 7,505.01 : x
2. Step 2: Convert to fraction form
   12,540.57/17,305.98 = 7,505.01/x
3. Step 3: Cross multiply
   12,540.57x = 17,305.98 × 7,505.01
4. Step 4: Simplify right side
   12,540.57x = 129,881,552.96
5. Step 5: Solve for x
   x = 129,881,552.96/12,540.57
6. Step 6: Final answer
   x = 10,356.91