Finding the Third Proportional to 142,967.53 and 309,471.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,967.53 : 309,471.05 = 309,471.05 : x
2. Step 2: Convert to fraction form
   142,967.53/309,471.05 = 309,471.05/x
3. Step 3: Cross multiply
   142,967.53x = 309,471.05 × 309,471.05
4. Step 4: Simplify right side
   142,967.53x = 95,772,328,853.91
5. Step 5: Solve for x
   x = 95,772,328,853.91/142,967.53
6. Step 6: Final answer
   x = 669,888.67