Finding the Fourth Proportional to 9,359.56, 12,916.50 and 5,381.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.56 : 12,916.50 = 5,381.32 : x
2. Step 2: Convert to fraction form
   9,359.56/12,916.50 = 5,381.32/x
3. Step 3: Cross multiply
   9,359.56x = 12,916.50 × 5,381.32
4. Step 4: Simplify right side
   9,359.56x = 69,507,819.78
5. Step 5: Solve for x
   x = 69,507,819.78/9,359.56
6. Step 6: Final answer
   x = 7,426.40