Finding the Third Proportional to 142,158.80 and 309,232.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,158.80 : 309,232.69 = 309,232.69 : x
2. Step 2: Convert to fraction form
   142,158.80/309,232.69 = 309,232.69/x
3. Step 3: Cross multiply
   142,158.80x = 309,232.69 × 309,232.69
4. Step 4: Simplify right side
   142,158.80x = 95,624,855,018.47
5. Step 5: Solve for x
   x = 95,624,855,018.47/142,158.80
6. Step 6: Final answer
   x = 672,662.24