Finding the Third Proportional to 213,975 and 331,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   213,975 : 331,153.50 = 331,153.50 : x
2. Step 2: Convert to fraction form
   213,975/331,153.50 = 331,153.50/x
3. Step 3: Cross multiply
   213,975x = 331,153.50 × 331,153.50
4. Step 4: Simplify right side
   213,975x = 109,662,640,562.25
5. Step 5: Solve for x
   x = 109,662,640,562.25/213,975
6. Step 6: Final answer
   x = 512,502.12