Finding the Fourth Proportional to 16,280.16, 22,471.26 and 9,907.74

Step by Step Solution

1. Step 1: Write the proportion equation
   16,280.16 : 22,471.26 = 9,907.74 : x
2. Step 2: Convert to fraction form
   16,280.16/22,471.26 = 9,907.74/x
3. Step 3: Cross multiply
   16,280.16x = 22,471.26 × 9,907.74
4. Step 4: Simplify right side
   16,280.16x = 222,639,401.55
5. Step 5: Solve for x
   x = 222,639,401.55/16,280.16
6. Step 6: Final answer
   x = 13,675.50