Finding the Third Proportional to 12,915,990 and 28,101,906

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915,990 : 28,101,906 = 28,101,906 : x
2. Step 2: Convert to fraction form
   12,915,990/28,101,906 = 28,101,906/x
3. Step 3: Cross multiply
   12,915,990x = 28,101,906 × 28,101,906
4. Step 4: Simplify right side
   12,915,990x = 789,717,120,832,836
5. Step 5: Solve for x
   x = 789,717,120,832,836/12,915,990
6. Step 6: Final answer
   x = 61,142,593.08