Finding the Third Proportional to 1,215,908 and 2,086,294

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,908 : 2,086,294 = 2,086,294 : x
2. Step 2: Convert to fraction form
   1,215,908/2,086,294 = 2,086,294/x
3. Step 3: Cross multiply
   1,215,908x = 2,086,294 × 2,086,294
4. Step 4: Simplify right side
   1,215,908x = 4,352,622,654,436
5. Step 5: Solve for x
   x = 4,352,622,654,436/1,215,908
6. Step 6: Final answer
   x = 3,579,730.25