Finding the Third Proportional to 3,561,306 and 8,398,407

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561,306 : 8,398,407 = 8,398,407 : x
2. Step 2: Convert to fraction form
   3,561,306/8,398,407 = 8,398,407/x
3. Step 3: Cross multiply
   3,561,306x = 8,398,407 × 8,398,407
4. Step 4: Simplify right side
   3,561,306x = 70,533,240,137,649
5. Step 5: Solve for x
   x = 70,533,240,137,649/3,561,306
6. Step 6: Final answer
   x = 19,805,442.20