Finding the Fourth Proportional to 28,355.67, 42,521.15 and 8,629.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,355.67 : 42,521.15 = 8,629.59 : x
2. Step 2: Convert to fraction form
   28,355.67/42,521.15 = 8,629.59/x
3. Step 3: Cross multiply
   28,355.67x = 42,521.15 × 8,629.59
4. Step 4: Simplify right side
   28,355.67x = 366,940,032.68
5. Step 5: Solve for x
   x = 366,940,032.68/28,355.67
6. Step 6: Final answer
   x = 12,940.62