Finding the Fourth Proportional to 141,891.50, 195,811.59 and 78,231.57

Step by Step Solution

1. Step 1: Write the proportion equation
   141,891.50 : 195,811.59 = 78,231.57 : x
2. Step 2: Convert to fraction form
   141,891.50/195,811.59 = 78,231.57/x
3. Step 3: Cross multiply
   141,891.50x = 195,811.59 × 78,231.57
4. Step 4: Simplify right side
   141,891.50x = 15,318,648,109.90
5. Step 5: Solve for x
   x = 15,318,648,109.90/141,891.50
6. Step 6: Final answer
   x = 107,960.30