Finding the Third Proportional to 9,988,487 and 21,492,929

Step by Step Solution

1. Step 1: Write the proportion equation
   9,988,487 : 21,492,929 = 21,492,929 : x
2. Step 2: Convert to fraction form
   9,988,487/21,492,929 = 21,492,929/x
3. Step 3: Cross multiply
   9,988,487x = 21,492,929 × 21,492,929
4. Step 4: Simplify right side
   9,988,487x = 461,945,996,999,041
5. Step 5: Solve for x
   x = 461,945,996,999,041/9,988,487
6. Step 6: Final answer
   x = 46,247,844.84