Finding the Fourth Proportional to 116,163.50, 160,354.74 and 78,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   116,163.50 : 160,354.74 = 78,488.78 : x
2. Step 2: Convert to fraction form
   116,163.50/160,354.74 = 78,488.78/x
3. Step 3: Cross multiply
   116,163.50x = 160,354.74 × 78,488.78
4. Step 4: Simplify right side
   116,163.50x = 12,586,047,909.82
5. Step 5: Solve for x
   x = 12,586,047,909.82/116,163.50
6. Step 6: Final answer
   x = 108,347.70