Finding the Fourth Proportional to 72,578.68, 108,874.86 and 28,208.83

Step by Step Solution

1. Step 1: Write the proportion equation
   72,578.68 : 108,874.86 = 28,208.83 : x
2. Step 2: Convert to fraction form
   72,578.68/108,874.86 = 28,208.83/x
3. Step 3: Cross multiply
   72,578.68x = 108,874.86 × 28,208.83
4. Step 4: Simplify right side
   72,578.68x = 3,071,231,872.64
5. Step 5: Solve for x
   x = 3,071,231,872.64/72,578.68
6. Step 6: Final answer
   x = 42,315.90