Finding the Fourth Proportional to 72,578.43, 108,874.49 and 28,208.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,578.43 : 108,874.49 = 28,208.58 : x
2. Step 2: Convert to fraction form
   72,578.43/108,874.49 = 28,208.58/x
3. Step 3: Cross multiply
   72,578.43x = 108,874.49 × 28,208.58
4. Step 4: Simplify right side
   72,578.43x = 3,071,194,761.12
5. Step 5: Solve for x
   x = 3,071,194,761.12/72,578.43
6. Step 6: Final answer
   x = 42,315.53