Finding the Third Proportional to 315,594 and 654,478

Step by Step Solution

1. Step 1: Write the proportion equation
   315,594 : 654,478 = 654,478 : x
2. Step 2: Convert to fraction form
   315,594/654,478 = 654,478/x
3. Step 3: Cross multiply
   315,594x = 654,478 × 654,478
4. Step 4: Simplify right side
   315,594x = 428,341,452,484
5. Step 5: Solve for x
   x = 428,341,452,484/315,594
6. Step 6: Final answer
   x = 1,357,254.74