Finding the Third Proportional to 21,018,582 and 31,678,209

Step by Step Solution

1. Step 1: Write the proportion equation
   21,018,582 : 31,678,209 = 31,678,209 : x
2. Step 2: Convert to fraction form
   21,018,582/31,678,209 = 31,678,209/x
3. Step 3: Cross multiply
   21,018,582x = 31,678,209 × 31,678,209
4. Step 4: Simplify right side
   21,018,582x = 1,003,508,925,447,681
5. Step 5: Solve for x
   x = 1,003,508,925,447,681/21,018,582
6. Step 6: Final answer
   x = 47,743,892.78