Finding the Fourth Proportional to 11,393.31, 15,729.89 and 8,735.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,393.31 : 15,729.89 = 8,735.61 : x
2. Step 2: Convert to fraction form
   11,393.31/15,729.89 = 8,735.61/x
3. Step 3: Cross multiply
   11,393.31x = 15,729.89 × 8,735.61
4. Step 4: Simplify right side
   11,393.31x = 137,410,184.38
5. Step 5: Solve for x
   x = 137,410,184.38/11,393.31
6. Step 6: Final answer
   x = 12,060.60