Finding the Third Proportional to 572,642 and 1,221,118

Step by Step Solution

1. Step 1: Write the proportion equation
   572,642 : 1,221,118 = 1,221,118 : x
2. Step 2: Convert to fraction form
   572,642/1,221,118 = 1,221,118/x
3. Step 3: Cross multiply
   572,642x = 1,221,118 × 1,221,118
4. Step 4: Simplify right side
   572,642x = 1,491,129,169,924
5. Step 5: Solve for x
   x = 1,491,129,169,924/572,642
6. Step 6: Final answer
   x = 2,603,946.57