Finding the Third Proportional to 3,912,087 and 8,402,635

Step by Step Solution

1. Step 1: Write the proportion equation
   3,912,087 : 8,402,635 = 8,402,635 : x
2. Step 2: Convert to fraction form
   3,912,087/8,402,635 = 8,402,635/x
3. Step 3: Cross multiply
   3,912,087x = 8,402,635 × 8,402,635
4. Step 4: Simplify right side
   3,912,087x = 70,604,274,943,225
5. Step 5: Solve for x
   x = 70,604,274,943,225/3,912,087
6. Step 6: Final answer
   x = 18,047,726.17