Finding the Fourth Proportional to 72,816.65, 100,517.94 and 48,957.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,816.65 : 100,517.94 = 48,957.15 : x
2. Step 2: Convert to fraction form
   72,816.65/100,517.94 = 48,957.15/x
3. Step 3: Cross multiply
   72,816.65x = 100,517.94 × 48,957.15
4. Step 4: Simplify right side
   72,816.65x = 4,921,071,866.27
5. Step 5: Solve for x
   x = 4,921,071,866.27/72,816.65
6. Step 6: Final answer
   x = 67,581.69