Finding the Third Proportional to 320,499 and 464,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,499 : 464,212.50 = 464,212.50 : x
2. Step 2: Convert to fraction form
   320,499/464,212.50 = 464,212.50/x
3. Step 3: Cross multiply
   320,499x = 464,212.50 × 464,212.50
4. Step 4: Simplify right side
   320,499x = 215,493,245,156.25
5. Step 5: Solve for x
   x = 215,493,245,156.25/320,499
6. Step 6: Final answer
   x = 672,367.92