Finding the Fourth Proportional to 11,478.43, 15,849.57 and 9,354.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,478.43 : 15,849.57 = 9,354.27 : x
2. Step 2: Convert to fraction form
   11,478.43/15,849.57 = 9,354.27/x
3. Step 3: Cross multiply
   11,478.43x = 15,849.57 × 9,354.27
4. Step 4: Simplify right side
   11,478.43x = 148,261,157.16
5. Step 5: Solve for x
   x = 148,261,157.16/11,478.43
6. Step 6: Final answer
   x = 12,916.50