Finding the Fourth Proportional to 140,981.89, 194,554.61 and 80,571.28

Step by Step Solution

1. Step 1: Write the proportion equation
   140,981.89 : 194,554.61 = 80,571.28 : x
2. Step 2: Convert to fraction form
   140,981.89/194,554.61 = 80,571.28/x
3. Step 3: Cross multiply
   140,981.89x = 194,554.61 × 80,571.28
4. Step 4: Simplify right side
   140,981.89x = 15,675,513,957.60
5. Step 5: Solve for x
   x = 15,675,513,957.60/140,981.89
6. Step 6: Final answer
   x = 111,188.14