Finding the Third Proportional to 1,400,990 and 2,218,773

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400,990 : 2,218,773 = 2,218,773 : x
2. Step 2: Convert to fraction form
   1,400,990/2,218,773 = 2,218,773/x
3. Step 3: Cross multiply
   1,400,990x = 2,218,773 × 2,218,773
4. Step 4: Simplify right side
   1,400,990x = 4,922,953,625,529
5. Step 5: Solve for x
   x = 4,922,953,625,529/1,400,990
6. Step 6: Final answer
   x = 3,513,910.61