Finding the Third Proportional to 12,942,111 and 20,603,420

Step by Step Solution

1. Step 1: Write the proportion equation
   12,942,111 : 20,603,420 = 20,603,420 : x
2. Step 2: Convert to fraction form
   12,942,111/20,603,420 = 20,603,420/x
3. Step 3: Cross multiply
   12,942,111x = 20,603,420 × 20,603,420
4. Step 4: Simplify right side
   12,942,111x = 424,500,915,696,400
5. Step 5: Solve for x
   x = 424,500,915,696,400/12,942,111
6. Step 6: Final answer
   x = 32,799,974.88