Finding the Fourth Proportional to 28,333.89, 42,501.72 and 8,612.61

Step by Step Solution

1. Step 1: Write the proportion equation
   28,333.89 : 42,501.72 = 8,612.61 : x
2. Step 2: Convert to fraction form
   28,333.89/42,501.72 = 8,612.61/x
3. Step 3: Cross multiply
   28,333.89x = 42,501.72 × 8,612.61
4. Step 4: Simplify right side
   28,333.89x = 366,050,738.69
5. Step 5: Solve for x
   x = 366,050,738.69/28,333.89
6. Step 6: Final answer
   x = 12,919.18