Finding the Third Proportional to 21,018,610 and 31,678,254

Step by Step Solution

1. Step 1: Write the proportion equation
   21,018,610 : 31,678,254 = 31,678,254 : x
2. Step 2: Convert to fraction form
   21,018,610/31,678,254 = 31,678,254/x
3. Step 3: Cross multiply
   21,018,610x = 31,678,254 × 31,678,254
4. Step 4: Simplify right side
   21,018,610x = 1,003,511,776,488,516
5. Step 5: Solve for x
   x = 1,003,511,776,488,516/21,018,610
6. Step 6: Final answer
   x = 47,743,964.82