Finding the Third Proportional to 3,561,312 and 8,398,428

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561,312 : 8,398,428 = 8,398,428 : x
2. Step 2: Convert to fraction form
   3,561,312/8,398,428 = 8,398,428/x
3. Step 3: Cross multiply
   3,561,312x = 8,398,428 × 8,398,428
4. Step 4: Simplify right side
   3,561,312x = 70,533,592,871,184
5. Step 5: Solve for x
   x = 70,533,592,871,184/3,561,312
6. Step 6: Final answer
   x = 19,805,507.88