Finding the Third Proportional to 639,168 and 1,398,594

Step by Step Solution

1. Step 1: Write the proportion equation
   639,168 : 1,398,594 = 1,398,594 : x
2. Step 2: Convert to fraction form
   639,168/1,398,594 = 1,398,594/x
3. Step 3: Cross multiply
   639,168x = 1,398,594 × 1,398,594
4. Step 4: Simplify right side
   639,168x = 1,956,065,176,836
5. Step 5: Solve for x
   x = 1,956,065,176,836/639,168
6. Step 6: Final answer
   x = 3,060,330.27