Finding the Fourth Proportional to 8,763.15, 12,080.62 and 5,403.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,763.15 : 12,080.62 = 5,403.72 : x
2. Step 2: Convert to fraction form
   8,763.15/12,080.62 = 5,403.72/x
3. Step 3: Cross multiply
   8,763.15x = 12,080.62 × 5,403.72
4. Step 4: Simplify right side
   8,763.15x = 65,280,287.91
5. Step 5: Solve for x
   x = 65,280,287.91/8,763.15
6. Step 6: Final answer
   x = 7,449.41