Finding the Third Proportional to 1,621,602 and 2,543,778

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621,602 : 2,543,778 = 2,543,778 : x
2. Step 2: Convert to fraction form
   1,621,602/2,543,778 = 2,543,778/x
3. Step 3: Cross multiply
   1,621,602x = 2,543,778 × 2,543,778
4. Step 4: Simplify right side
   1,621,602x = 6,470,806,513,284
5. Step 5: Solve for x
   x = 6,470,806,513,284/1,621,602
6. Step 6: Final answer
   x = 3,990,378.97