Finding the Fourth Proportional to 116,161.50, 160,351.98 and 78,486.78

Step by Step Solution

1. Step 1: Write the proportion equation
   116,161.50 : 160,351.98 = 78,486.78 : x
2. Step 2: Convert to fraction form
   116,161.50/160,351.98 = 78,486.78/x
3. Step 3: Cross multiply
   116,161.50x = 160,351.98 × 78,486.78
4. Step 4: Simplify right side
   116,161.50x = 12,585,510,576.82
5. Step 5: Solve for x
   x = 12,585,510,576.82/116,161.50
6. Step 6: Final answer
   x = 108,344.94