Finding the Third Proportional to 21,018,600 and 31,678,236

Step by Step Solution

1. Step 1: Write the proportion equation
   21,018,600 : 31,678,236 = 31,678,236 : x
2. Step 2: Convert to fraction form
   21,018,600/31,678,236 = 31,678,236/x
3. Step 3: Cross multiply
   21,018,600x = 31,678,236 × 31,678,236
4. Step 4: Simplify right side
   21,018,600x = 1,003,510,636,071,696
5. Step 5: Solve for x
   x = 1,003,510,636,071,696/21,018,600
6. Step 6: Final answer
   x = 47,743,933.28