Finding the Fourth Proportional to 9,359.09, 12,916.50 and 5,380.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.09 : 12,916.50 = 5,380.37 : x
2. Step 2: Convert to fraction form
   9,359.09/12,916.50 = 5,380.37/x
3. Step 3: Cross multiply
   9,359.09x = 12,916.50 × 5,380.37
4. Step 4: Simplify right side
   9,359.09x = 69,495,549.11
5. Step 5: Solve for x
   x = 69,495,549.11/9,359.09
6. Step 6: Final answer
   x = 7,425.46