Finding the Third Proportional to 9,691,812 and 21,144,036

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,812 : 21,144,036 = 21,144,036 : x
2. Step 2: Convert to fraction form
   9,691,812/21,144,036 = 21,144,036/x
3. Step 3: Cross multiply
   9,691,812x = 21,144,036 × 21,144,036
4. Step 4: Simplify right side
   9,691,812x = 447,070,258,369,296
5. Step 5: Solve for x
   x = 447,070,258,369,296/9,691,812
6. Step 6: Final answer
   x = 46,128,655.65