Finding the Fourth Proportional to 78,687.78, 118,043.94 and 31,943.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,687.78 : 118,043.94 = 31,943.94 : x
2. Step 2: Convert to fraction form
   78,687.78/118,043.94 = 31,943.94/x
3. Step 3: Cross multiply
   78,687.78x = 118,043.94 × 31,943.94
4. Step 4: Simplify right side
   78,687.78x = 3,770,788,536.72
5. Step 5: Solve for x
   x = 3,770,788,536.72/78,687.78
6. Step 6: Final answer
   x = 47,920.89