Finding the Fourth Proportional to 11,152.94, 15,371.04 and 9,157.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,152.94 : 15,371.04 = 9,157.10 : x
2. Step 2: Convert to fraction form
   11,152.94/15,371.04 = 9,157.10/x
3. Step 3: Cross multiply
   11,152.94x = 15,371.04 × 9,157.10
4. Step 4: Simplify right side
   11,152.94x = 140,754,150.38
5. Step 5: Solve for x
   x = 140,754,150.38/11,152.94
6. Step 6: Final answer
   x = 12,620.36