Finding the Fourth Proportional to 10,985.92, 16,480.24 and 3,591.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,985.92 : 16,480.24 = 3,591.12 : x
2. Step 2: Convert to fraction form
   10,985.92/16,480.24 = 3,591.12/x
3. Step 3: Cross multiply
   10,985.92x = 16,480.24 × 3,591.12
4. Step 4: Simplify right side
   10,985.92x = 59,182,519.47
5. Step 5: Solve for x
   x = 59,182,519.47/10,985.92
6. Step 6: Final answer
   x = 5,387.12