Finding the Fourth Proportional to 28,333.88, 42,489.47 and 8,608.76

Step by Step Solution

1. Step 1: Write the proportion equation
   28,333.88 : 42,489.47 = 8,608.76 : x
2. Step 2: Convert to fraction form
   28,333.88/42,489.47 = 8,608.76/x
3. Step 3: Cross multiply
   28,333.88x = 42,489.47 × 8,608.76
4. Step 4: Simplify right side
   28,333.88x = 365,781,458.83
5. Step 5: Solve for x
   x = 365,781,458.83/28,333.88
6. Step 6: Final answer
   x = 12,909.69