Finding the Third Proportional to 142,527.75 and 309,864

Step by Step Solution

1. Step 1: Write the proportion equation
   142,527.75 : 309,864 = 309,864 : x
2. Step 2: Convert to fraction form
   142,527.75/309,864 = 309,864/x
3. Step 3: Cross multiply
   142,527.75x = 309,864 × 309,864
4. Step 4: Simplify right side
   142,527.75x = 96,015,698,496
5. Step 5: Solve for x
   x = 96,015,698,496/142,527.75
6. Step 6: Final answer
   x = 673,663.19