Finding the Fourth Proportional to 11,337.57, 15,660.81 and 9,455.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,337.57 : 15,660.81 = 9,455.31 : x
2. Step 2: Convert to fraction form
   11,337.57/15,660.81 = 9,455.31/x
3. Step 3: Cross multiply
   11,337.57x = 15,660.81 × 9,455.31
4. Step 4: Simplify right side
   11,337.57x = 148,077,813.40
5. Step 5: Solve for x
   x = 148,077,813.40/11,337.57
6. Step 6: Final answer
   x = 13,060.81