Finding the Fourth Proportional to 9,376.79, 12,940.43 and 5,398.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,376.79 : 12,940.43 = 5,398.52 : x
2. Step 2: Convert to fraction form
   9,376.79/12,940.43 = 5,398.52/x
3. Step 3: Cross multiply
   9,376.79x = 12,940.43 × 5,398.52
4. Step 4: Simplify right side
   9,376.79x = 69,859,078.47
5. Step 5: Solve for x
   x = 69,859,078.47/9,376.79
6. Step 6: Final answer
   x = 7,450.22