Finding the Fourth Proportional to 72,693.29, 108,998.91 and 28,269.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,693.29 : 108,998.91 = 28,269.17 : x
2. Step 2: Convert to fraction form
   72,693.29/108,998.91 = 28,269.17/x
3. Step 3: Cross multiply
   72,693.29x = 108,998.91 × 28,269.17
4. Step 4: Simplify right side
   72,693.29x = 3,081,308,171.61
5. Step 5: Solve for x
   x = 3,081,308,171.61/72,693.29
6. Step 6: Final answer
   x = 42,387.80