Finding the Fourth Proportional to 28,337.55, 42,503.59 and 8,616.30

Step by Step Solution

1. Step 1: Write the proportion equation
   28,337.55 : 42,503.59 = 8,616.30 : x
2. Step 2: Convert to fraction form
   28,337.55/42,503.59 = 8,616.30/x
3. Step 3: Cross multiply
   28,337.55x = 42,503.59 × 8,616.30
4. Step 4: Simplify right side
   28,337.55x = 366,223,682.52
5. Step 5: Solve for x
   x = 366,223,682.52/28,337.55
6. Step 6: Final answer
   x = 12,923.62