Finding the Third Proportional to 1,215,618 and 2,645,292

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,618 : 2,645,292 = 2,645,292 : x
2. Step 2: Convert to fraction form
   1,215,618/2,645,292 = 2,645,292/x
3. Step 3: Cross multiply
   1,215,618x = 2,645,292 × 2,645,292
4. Step 4: Simplify right side
   1,215,618x = 6,997,569,765,264
5. Step 5: Solve for x
   x = 6,997,569,765,264/1,215,618
6. Step 6: Final answer
   x = 5,756,388.74