Finding the Third Proportional to 2,920,612 and 6,391,790

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920,612 : 6,391,790 = 6,391,790 : x
2. Step 2: Convert to fraction form
   2,920,612/6,391,790 = 6,391,790/x
3. Step 3: Cross multiply
   2,920,612x = 6,391,790 × 6,391,790
4. Step 4: Simplify right side
   2,920,612x = 40,854,979,404,100
5. Step 5: Solve for x
   x = 40,854,979,404,100/2,920,612
6. Step 6: Final answer
   x = 13,988,499.47