Finding the Third Proportional to 9,988,518 and 21,492,992

Step by Step Solution

1. Step 1: Write the proportion equation
   9,988,518 : 21,492,992 = 21,492,992 : x
2. Step 2: Convert to fraction form
   9,988,518/21,492,992 = 21,492,992/x
3. Step 3: Cross multiply
   9,988,518x = 21,492,992 × 21,492,992
4. Step 4: Simplify right side
   9,988,518x = 461,948,705,112,064
5. Step 5: Solve for x
   x = 461,948,705,112,064/9,988,518
6. Step 6: Final answer
   x = 46,247,972.43