Finding the Third Proportional to 401,662 and 580,380

Step by Step Solution

1. Step 1: Write the proportion equation
   401,662 : 580,380 = 580,380 : x
2. Step 2: Convert to fraction form
   401,662/580,380 = 580,380/x
3. Step 3: Cross multiply
   401,662x = 580,380 × 580,380
4. Step 4: Simplify right side
   401,662x = 336,840,944,400
5. Step 5: Solve for x
   x = 336,840,944,400/401,662
6. Step 6: Final answer
   x = 838,617.90