Finding the Fourth Proportional to 16,280.56, 24,419.60 and 5,187.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,280.56 : 24,419.60 = 5,187.60 : x
2. Step 2: Convert to fraction form
   16,280.56/24,419.60 = 5,187.60/x
3. Step 3: Cross multiply
   16,280.56x = 24,419.60 × 5,187.60
4. Step 4: Simplify right side
   16,280.56x = 126,679,116.96
5. Step 5: Solve for x
   x = 126,679,116.96/16,280.56
6. Step 6: Final answer
   x = 7,781.00