Finding the Third Proportional to 212,754 and 324,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,754 : 324,781.50 = 324,781.50 : x
2. Step 2: Convert to fraction form
   212,754/324,781.50 = 324,781.50/x
3. Step 3: Cross multiply
   212,754x = 324,781.50 × 324,781.50
4. Step 4: Simplify right side
   212,754x = 105,483,022,742.25
5. Step 5: Solve for x
   x = 105,483,022,742.25/212,754
6. Step 6: Final answer
   x = 495,798.07