Finding the Fourth Proportional to 10,912.53, 15,025.53 and 8,532.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,912.53 : 15,025.53 = 8,532.15 : x
2. Step 2: Convert to fraction form
   10,912.53/15,025.53 = 8,532.15/x
3. Step 3: Cross multiply
   10,912.53x = 15,025.53 × 8,532.15
4. Step 4: Simplify right side
   10,912.53x = 128,200,075.79
5. Step 5: Solve for x
   x = 128,200,075.79/10,912.53
6. Step 6: Final answer
   x = 11,747.97