Finding the Third Proportional to 1,057,542 and 2,186,220

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057,542 : 2,186,220 = 2,186,220 : x
2. Step 2: Convert to fraction form
   1,057,542/2,186,220 = 2,186,220/x
3. Step 3: Cross multiply
   1,057,542x = 2,186,220 × 2,186,220
4. Step 4: Simplify right side
   1,057,542x = 4,779,557,888,400
5. Step 5: Solve for x
   x = 4,779,557,888,400/1,057,542
6. Step 6: Final answer
   x = 4,519,496.99