Finding the Fourth Proportional to 10,391.60, 15,597.12 and 5,132.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.60 : 15,597.12 = 5,132.55 : x
2. Step 2: Convert to fraction form
   10,391.60/15,597.12 = 5,132.55/x
3. Step 3: Cross multiply
   10,391.60x = 15,597.12 × 5,132.55
4. Step 4: Simplify right side
   10,391.60x = 80,052,972.59
5. Step 5: Solve for x
   x = 80,052,972.59/10,391.60
6. Step 6: Final answer
   x = 7,703.62