Finding the Third Proportional to 321,585.75 and 635,040

Step by Step Solution

1. Step 1: Write the proportion equation
   321,585.75 : 635,040 = 635,040 : x
2. Step 2: Convert to fraction form
   321,585.75/635,040 = 635,040/x
3. Step 3: Cross multiply
   321,585.75x = 635,040 × 635,040
4. Step 4: Simplify right side
   321,585.75x = 403,275,801,600
5. Step 5: Solve for x
   x = 403,275,801,600/321,585.75
6. Step 6: Final answer
   x = 1,254,022.61