Finding the Third Proportional to 342,564 and 722,055

Step by Step Solution

1. Step 1: Write the proportion equation
   342,564 : 722,055 = 722,055 : x
2. Step 2: Convert to fraction form
   342,564/722,055 = 722,055/x
3. Step 3: Cross multiply
   342,564x = 722,055 × 722,055
4. Step 4: Simplify right side
   342,564x = 521,363,423,025
5. Step 5: Solve for x
   x = 521,363,423,025/342,564
6. Step 6: Final answer
   x = 1,521,944.58