Finding the Fourth Proportional to 10,891.12, 16,335.56 and 3,500.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,891.12 : 16,335.56 = 3,500.88 : x
2. Step 2: Convert to fraction form
   10,891.12/16,335.56 = 3,500.88/x
3. Step 3: Cross multiply
   10,891.12x = 16,335.56 × 3,500.88
4. Step 4: Simplify right side
   10,891.12x = 57,188,835.29
5. Step 5: Solve for x
   x = 57,188,835.29/10,891.12
6. Step 6: Final answer
   x = 5,250.96