Finding the Fourth Proportional to 10,980.24, 16,449.72 and 5,427.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,980.24 : 16,449.72 = 5,427.12 : x
2. Step 2: Convert to fraction form
   10,980.24/16,449.72 = 5,427.12/x
3. Step 3: Cross multiply
   10,980.24x = 16,449.72 × 5,427.12
4. Step 4: Simplify right side
   10,980.24x = 89,274,604.41
5. Step 5: Solve for x
   x = 89,274,604.41/10,980.24
6. Step 6: Final answer
   x = 8,130.48