Finding the Third Proportional to 644,920 and 1,342,160

Step by Step Solution

1. Step 1: Write the proportion equation
   644,920 : 1,342,160 = 1,342,160 : x
2. Step 2: Convert to fraction form
   644,920/1,342,160 = 1,342,160/x
3. Step 3: Cross multiply
   644,920x = 1,342,160 × 1,342,160
4. Step 4: Simplify right side
   644,920x = 1,801,393,465,600
5. Step 5: Solve for x
   x = 1,801,393,465,600/644,920
6. Step 6: Final answer
   x = 2,793,204.53