Finding the Fourth Proportional to 10,727.20, 16,080.72 and 5,531.68

Step by Step Solution

1. Step 1: Write the proportion equation
   10,727.20 : 16,080.72 = 5,531.68 : x
2. Step 2: Convert to fraction form
   10,727.20/16,080.72 = 5,531.68/x
3. Step 3: Cross multiply
   10,727.20x = 16,080.72 × 5,531.68
4. Step 4: Simplify right side
   10,727.20x = 88,953,397.21
5. Step 5: Solve for x
   x = 88,953,397.21/10,727.20
6. Step 6: Final answer
   x = 8,292.32