Finding the Third Proportional to 9,974,876 and 21,488,509

Step by Step Solution

1. Step 1: Write the proportion equation
   9,974,876 : 21,488,509 = 21,488,509 : x
2. Step 2: Convert to fraction form
   9,974,876/21,488,509 = 21,488,509/x
3. Step 3: Cross multiply
   9,974,876x = 21,488,509 × 21,488,509
4. Step 4: Simplify right side
   9,974,876x = 461,756,019,043,081
5. Step 5: Solve for x
   x = 461,756,019,043,081/9,974,876
6. Step 6: Final answer
   x = 46,291,905.69