Finding the Fourth Proportional to 72,695.59, 108,998.73 and 28,270.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,695.59 : 108,998.73 = 28,270.55 : x
2. Step 2: Convert to fraction form
   72,695.59/108,998.73 = 28,270.55/x
3. Step 3: Cross multiply
   72,695.59x = 108,998.73 × 28,270.55
4. Step 4: Simplify right side
   72,695.59x = 3,081,454,318.90
5. Step 5: Solve for x
   x = 3,081,454,318.90/72,695.59
6. Step 6: Final answer
   x = 42,388.46