Finding the Fourth Proportional to 72,579.43, 108,875.99 and 28,209.58

Step by Step Solution

1. Step 1: Write the proportion equation
   72,579.43 : 108,875.99 = 28,209.58 : x
2. Step 2: Convert to fraction form
   72,579.43/108,875.99 = 28,209.58/x
3. Step 3: Cross multiply
   72,579.43x = 108,875.99 × 28,209.58
4. Step 4: Simplify right side
   72,579.43x = 3,071,345,949.98
5. Step 5: Solve for x
   x = 3,071,345,949.98/72,579.43
6. Step 6: Final answer
   x = 42,317.03