Finding the Third Proportional to 20,878,728 and 31,942,116

Step by Step Solution

1. Step 1: Write the proportion equation
   20,878,728 : 31,942,116 = 31,942,116 : x
2. Step 2: Convert to fraction form
   20,878,728/31,942,116 = 31,942,116/x
3. Step 3: Cross multiply
   20,878,728x = 31,942,116 × 31,942,116
4. Step 4: Simplify right side
   20,878,728x = 1,020,298,774,557,456
5. Step 5: Solve for x
   x = 1,020,298,774,557,456/20,878,728
6. Step 6: Final answer
   x = 48,867,860.85