Finding the Fourth Proportional to 10,780.56, 16,140.85 and 5,504.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,780.56 : 16,140.85 = 5,504.18 : x
2. Step 2: Convert to fraction form
   10,780.56/16,140.85 = 5,504.18/x
3. Step 3: Cross multiply
   10,780.56x = 16,140.85 × 5,504.18
4. Step 4: Simplify right side
   10,780.56x = 88,842,049.29
5. Step 5: Solve for x
   x = 88,842,049.29/10,780.56
6. Step 6: Final answer
   x = 8,240.95