Finding the Third Proportional to 21,047,982 and 31,486,144

Step by Step Solution

1. Step 1: Write the proportion equation
   21,047,982 : 31,486,144 = 31,486,144 : x
2. Step 2: Convert to fraction form
   21,047,982/31,486,144 = 31,486,144/x
3. Step 3: Cross multiply
   21,047,982x = 31,486,144 × 31,486,144
4. Step 4: Simplify right side
   21,047,982x = 991,377,263,988,736
5. Step 5: Solve for x
   x = 991,377,263,988,736/21,047,982
6. Step 6: Final answer
   x = 47,100,822.49