Finding the Third Proportional to 320,358 and 704,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,358 : 704,665.50 = 704,665.50 : x
2. Step 2: Convert to fraction form
   320,358/704,665.50 = 704,665.50/x
3. Step 3: Cross multiply
   320,358x = 704,665.50 × 704,665.50
4. Step 4: Simplify right side
   320,358x = 496,553,466,890.25
5. Step 5: Solve for x
   x = 496,553,466,890.25/320,358
6. Step 6: Final answer
   x = 1,549,995.53