Finding the Fourth Proportional to 16,520.73, 24,784.18 and 5,428.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,520.73 : 24,784.18 = 5,428.20 : x
2. Step 2: Convert to fraction form
   16,520.73/24,784.18 = 5,428.20/x
3. Step 3: Cross multiply
   16,520.73x = 24,784.18 × 5,428.20
4. Step 4: Simplify right side
   16,520.73x = 134,533,530.39
5. Step 5: Solve for x
   x = 134,533,530.39/16,520.73
6. Step 6: Final answer
   x = 8,143.31