Finding the Fourth Proportional to 11,256.96, 15,540.89 and 7,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,256.96 : 15,540.89 = 7,485.30 : x
2. Step 2: Convert to fraction form
   11,256.96/15,540.89 = 7,485.30/x
3. Step 3: Cross multiply
   11,256.96x = 15,540.89 × 7,485.30
4. Step 4: Simplify right side
   11,256.96x = 116,328,223.92
5. Step 5: Solve for x
   x = 116,328,223.92/11,256.96
6. Step 6: Final answer
   x = 10,333.89