Finding the Fourth Proportional to 8,761.28, 12,087.06 and 5,398.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,761.28 : 12,087.06 = 5,398.25 : x
2. Step 2: Convert to fraction form
   8,761.28/12,087.06 = 5,398.25/x
3. Step 3: Cross multiply
   8,761.28x = 12,087.06 × 5,398.25
4. Step 4: Simplify right side
   8,761.28x = 65,249,001.86
5. Step 5: Solve for x
   x = 65,249,001.86/8,761.28
6. Step 6: Final answer
   x = 7,447.43