Finding the Fourth Proportional to 141,150.67, 194,740.40 and 80,678.50

Step by Step Solution

1. Step 1: Write the proportion equation
   141,150.67 : 194,740.40 = 80,678.50 : x
2. Step 2: Convert to fraction form
   141,150.67/194,740.40 = 80,678.50/x
3. Step 3: Cross multiply
   141,150.67x = 194,740.40 × 80,678.50
4. Step 4: Simplify right side
   141,150.67x = 15,711,363,076.25
5. Step 5: Solve for x
   x = 15,711,363,076.25/141,150.67
6. Step 6: Final answer
   x = 111,309.17