Finding the Third Proportional to 1,236,458 and 2,636,220

Step by Step Solution

1. Step 1: Write the proportion equation
   1,236,458 : 2,636,220 = 2,636,220 : x
2. Step 2: Convert to fraction form
   1,236,458/2,636,220 = 2,636,220/x
3. Step 3: Cross multiply
   1,236,458x = 2,636,220 × 2,636,220
4. Step 4: Simplify right side
   1,236,458x = 6,949,655,888,400
5. Step 5: Solve for x
   x = 6,949,655,888,400/1,236,458
6. Step 6: Final answer
   x = 5,620,616.22