Finding the Fourth Proportional to 9,376.90, 12,940.41 and 5,398.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,376.90 : 12,940.41 = 5,398.81 : x
2. Step 2: Convert to fraction form
   9,376.90/12,940.41 = 5,398.81/x
3. Step 3: Cross multiply
   9,376.90x = 12,940.41 × 5,398.81
4. Step 4: Simplify right side
   9,376.90x = 69,862,814.91
5. Step 5: Solve for x
   x = 69,862,814.91/9,376.90
6. Step 6: Final answer
   x = 7,450.52