Finding the Third Proportional to 1,251,518 and 2,561,356

Step by Step Solution

1. Step 1: Write the proportion equation
   1,251,518 : 2,561,356 = 2,561,356 : x
2. Step 2: Convert to fraction form
   1,251,518/2,561,356 = 2,561,356/x
3. Step 3: Cross multiply
   1,251,518x = 2,561,356 × 2,561,356
4. Step 4: Simplify right side
   1,251,518x = 6,560,544,558,736
5. Step 5: Solve for x
   x = 6,560,544,558,736/1,251,518
6. Step 6: Final answer
   x = 5,242,069.68