Finding the Third Proportional to 3,561,402 and 8,398,707

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561,402 : 8,398,707 = 8,398,707 : x
2. Step 2: Convert to fraction form
   3,561,402/8,398,707 = 8,398,707/x
3. Step 3: Cross multiply
   3,561,402x = 8,398,707 × 8,398,707
4. Step 4: Simplify right side
   3,561,402x = 70,538,279,271,849
5. Step 5: Solve for x
   x = 70,538,279,271,849/3,561,402
6. Step 6: Final answer
   x = 19,806,323.26