Finding the Third Proportional to 322,585.50 and 728,415

Step by Step Solution

1. Step 1: Write the proportion equation
   322,585.50 : 728,415 = 728,415 : x
2. Step 2: Convert to fraction form
   322,585.50/728,415 = 728,415/x
3. Step 3: Cross multiply
   322,585.50x = 728,415 × 728,415
4. Step 4: Simplify right side
   322,585.50x = 530,588,412,225
5. Step 5: Solve for x
   x = 530,588,412,225/322,585.50
6. Step 6: Final answer
   x = 1,644,799.32