Finding the Fourth Proportional to 78,680.50, 117,940.73 and 31,329.11

Step by Step Solution

1. Step 1: Write the proportion equation
   78,680.50 : 117,940.73 = 31,329.11 : x
2. Step 2: Convert to fraction form
   78,680.50/117,940.73 = 31,329.11/x
3. Step 3: Cross multiply
   78,680.50x = 117,940.73 × 31,329.11
4. Step 4: Simplify right side
   78,680.50x = 3,694,978,241.86
5. Step 5: Solve for x
   x = 3,694,978,241.86/78,680.50
6. Step 6: Final answer
   x = 46,961.81