Finding the Third Proportional to 2,780,436 and 4,298,340

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780,436 : 4,298,340 = 4,298,340 : x
2. Step 2: Convert to fraction form
   2,780,436/4,298,340 = 4,298,340/x
3. Step 3: Cross multiply
   2,780,436x = 4,298,340 × 4,298,340
4. Step 4: Simplify right side
   2,780,436x = 18,475,726,755,600
5. Step 5: Solve for x
   x = 18,475,726,755,600/2,780,436
6. Step 6: Final answer
   x = 6,644,902.73