Finding the Third Proportional to 9,691,867 and 21,144,133

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,867 : 21,144,133 = 21,144,133 : x
2. Step 2: Convert to fraction form
   9,691,867/21,144,133 = 21,144,133/x
3. Step 3: Cross multiply
   9,691,867x = 21,144,133 × 21,144,133
4. Step 4: Simplify right side
   9,691,867x = 447,074,360,321,689
5. Step 5: Solve for x
   x = 447,074,360,321,689/9,691,867
6. Step 6: Final answer
   x = 46,128,817.11