Finding the Third Proportional to 639,594 and 1,366,596

Step by Step Solution

1. Step 1: Write the proportion equation
   639,594 : 1,366,596 = 1,366,596 : x
2. Step 2: Convert to fraction form
   639,594/1,366,596 = 1,366,596/x
3. Step 3: Cross multiply
   639,594x = 1,366,596 × 1,366,596
4. Step 4: Simplify right side
   639,594x = 1,867,584,627,216
5. Step 5: Solve for x
   x = 1,867,584,627,216/639,594
6. Step 6: Final answer
   x = 2,919,953.33