Finding the Fourth Proportional to 78,949.92, 108,949.59 and 43,139.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,949.92 : 108,949.59 = 43,139.16 : x
2. Step 2: Convert to fraction form
   78,949.92/108,949.59 = 43,139.16/x
3. Step 3: Cross multiply
   78,949.92x = 108,949.59 × 43,139.16
4. Step 4: Simplify right side
   78,949.92x = 4,699,993,794.94
5. Step 5: Solve for x
   x = 4,699,993,794.94/78,949.92
6. Step 6: Final answer
   x = 59,531.33