Finding the Third Proportional to 2,563,990 and 5,471,220

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563,990 : 5,471,220 = 5,471,220 : x
2. Step 2: Convert to fraction form
   2,563,990/5,471,220 = 5,471,220/x
3. Step 3: Cross multiply
   2,563,990x = 5,471,220 × 5,471,220
4. Step 4: Simplify right side
   2,563,990x = 29,934,248,288,400
5. Step 5: Solve for x
   x = 29,934,248,288,400/2,563,990
6. Step 6: Final answer
   x = 11,674,869.36