Finding the Third Proportional to 142,185.38 and 309,478.22

Step by Step Solution

1. Step 1: Write the proportion equation
   142,185.38 : 309,478.22 = 309,478.22 : x
2. Step 2: Convert to fraction form
   142,185.38/309,478.22 = 309,478.22/x
3. Step 3: Cross multiply
   142,185.38x = 309,478.22 × 309,478.22
4. Step 4: Simplify right side
   142,185.38x = 95,776,767,880.67
5. Step 5: Solve for x
   x = 95,776,767,880.67/142,185.38
6. Step 6: Final answer
   x = 673,604.92