Finding the Third Proportional to 320,355 and 704,659.50

Step by Step Solution

1. Step 1: Write the proportion equation
   320,355 : 704,659.50 = 704,659.50 : x
2. Step 2: Convert to fraction form
   320,355/704,659.50 = 704,659.50/x
3. Step 3: Cross multiply
   320,355x = 704,659.50 × 704,659.50
4. Step 4: Simplify right side
   320,355x = 496,545,010,940.25
5. Step 5: Solve for x
   x = 496,545,010,940.25/320,355
6. Step 6: Final answer
   x = 1,549,983.65