Finding the Third Proportional to 1,205,499 and 2,578,778

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,499 : 2,578,778 = 2,578,778 : x
2. Step 2: Convert to fraction form
   1,205,499/2,578,778 = 2,578,778/x
3. Step 3: Cross multiply
   1,205,499x = 2,578,778 × 2,578,778
4. Step 4: Simplify right side
   1,205,499x = 6,650,095,973,284
5. Step 5: Solve for x
   x = 6,650,095,973,284/1,205,499
6. Step 6: Final answer
   x = 5,516,467.43