Finding the Fourth Proportional to 11,123.08, 15,314.88 and 9,440.98

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.08 : 15,314.88 = 9,440.98 : x
2. Step 2: Convert to fraction form
   11,123.08/15,314.88 = 9,440.98/x
3. Step 3: Cross multiply
   11,123.08x = 15,314.88 × 9,440.98
4. Step 4: Simplify right side
   11,123.08x = 144,587,475.78
5. Step 5: Solve for x
   x = 144,587,475.78/11,123.08
6. Step 6: Final answer
   x = 12,998.87