Finding the Third Proportional to 12,942,126 and 20,603,443

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942,126 : 20,603,443 = 20,603,443 : x
2. Step 2: Convert to fraction form
   12,942,126/20,603,443 = 20,603,443/x
3. Step 3: Cross multiply
   12,942,126x = 20,603,443 × 20,603,443
4. Step 4: Simplify right side
   12,942,126x = 424,501,863,454,249
5. Step 5: Solve for x
   x = 424,501,863,454,249/12,942,126
6. Step 6: Final answer
   x = 32,800,010.10