Finding the Fourth Proportional to 8,755.59, 12,087.28 and 5,400.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,755.59 : 12,087.28 = 5,400.22 : x
2. Step 2: Convert to fraction form
   8,755.59/12,087.28 = 5,400.22/x
3. Step 3: Cross multiply
   8,755.59x = 12,087.28 × 5,400.22
4. Step 4: Simplify right side
   8,755.59x = 65,273,940.02
5. Step 5: Solve for x
   x = 65,273,940.02/8,755.59
6. Step 6: Final answer
   x = 7,455.11