Finding the Third Proportional to 338,418 and 722,509.88

Step by Step Solution

1. Step 1: Write the proportion equation
   338,418 : 722,509.88 = 722,509.88 : x
2. Step 2: Convert to fraction form
   338,418/722,509.88 = 722,509.88/x
3. Step 3: Cross multiply
   338,418x = 722,509.88 × 722,509.88
4. Step 4: Simplify right side
   338,418x = 522,020,519,472.52
5. Step 5: Solve for x
   x = 522,020,519,472.52/338,418
6. Step 6: Final answer
   x = 1,542,531.78