Finding the Fourth Proportional to 8,957.04, 12,361.71 and 5,420.17

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.04 : 12,361.71 = 5,420.17 : x
2. Step 2: Convert to fraction form
   8,957.04/12,361.71 = 5,420.17/x
3. Step 3: Cross multiply
   8,957.04x = 12,361.71 × 5,420.17
4. Step 4: Simplify right side
   8,957.04x = 67,002,569.69
5. Step 5: Solve for x
   x = 67,002,569.69/8,957.04
6. Step 6: Final answer
   x = 7,480.44