Finding the Fourth Proportional to 72,479.25, 108,792.59 and 49,991.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,479.25 : 108,792.59 = 49,991.49 : x
2. Step 2: Convert to fraction form
   72,479.25/108,792.59 = 49,991.49/x
3. Step 3: Cross multiply
   72,479.25x = 108,792.59 × 49,991.49
4. Step 4: Simplify right side
   72,479.25x = 5,438,703,425.10
5. Step 5: Solve for x
   x = 5,438,703,425.10/72,479.25
6. Step 6: Final answer
   x = 75,038.08