Finding the Third Proportional to 217,323 and 311,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   217,323 : 311,404.50 = 311,404.50 : x
2. Step 2: Convert to fraction form
   217,323/311,404.50 = 311,404.50/x
3. Step 3: Cross multiply
   217,323x = 311,404.50 × 311,404.50
4. Step 4: Simplify right side
   217,323x = 96,972,762,620.25
5. Step 5: Solve for x
   x = 96,972,762,620.25/217,323
6. Step 6: Final answer
   x = 446,214.91