Finding the Fourth Proportional to 140,315.56, 193,570.50 and 80,665

Step by Step Solution

1. Step 1: Write the proportion equation
   140,315.56 : 193,570.50 = 80,665 : x
2. Step 2: Convert to fraction form
   140,315.56/193,570.50 = 80,665/x
3. Step 3: Cross multiply
   140,315.56x = 193,570.50 × 80,665
4. Step 4: Simplify right side
   140,315.56x = 15,614,364,382.50
5. Step 5: Solve for x
   x = 15,614,364,382.50/140,315.56
6. Step 6: Final answer
   x = 111,280.35