Finding the Third Proportional to 80,599.50 and 141,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,599.50 : 141,691.50 = 141,691.50 : x
2. Step 2: Convert to fraction form
   80,599.50/141,691.50 = 141,691.50/x
3. Step 3: Cross multiply
   80,599.50x = 141,691.50 × 141,691.50
4. Step 4: Simplify right side
   80,599.50x = 20,076,481,172.25
5. Step 5: Solve for x
   x = 20,076,481,172.25/80,599.50
6. Step 6: Final answer
   x = 249,089.40