Finding the Third Proportional to 140,080.50 and 309,596

Step by Step Solution

1. Step 1: Write the proportion equation
   140,080.50 : 309,596 = 309,596 : x
2. Step 2: Convert to fraction form
   140,080.50/309,596 = 309,596/x
3. Step 3: Cross multiply
   140,080.50x = 309,596 × 309,596
4. Step 4: Simplify right side
   140,080.50x = 95,849,683,216
5. Step 5: Solve for x
   x = 95,849,683,216/140,080.50
6. Step 6: Final answer
   x = 684,247.15