Finding the Third Proportional to 361,048 and 561,308

Step by Step Solution

1. Step 1: Write the proportion equation
   361,048 : 561,308 = 561,308 : x
2. Step 2: Convert to fraction form
   361,048/561,308 = 561,308/x
3. Step 3: Cross multiply
   361,048x = 561,308 × 561,308
4. Step 4: Simplify right side
   361,048x = 315,066,670,864
5. Step 5: Solve for x
   x = 315,066,670,864/361,048
6. Step 6: Final answer
   x = 872,644.83