Finding the Third Proportional to 9,691,814 and 21,144,040

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,814 : 21,144,040 = 21,144,040 : x
2. Step 2: Convert to fraction form
   9,691,814/21,144,040 = 21,144,040/x
3. Step 3: Cross multiply
   9,691,814x = 21,144,040 × 21,144,040
4. Step 4: Simplify right side
   9,691,814x = 447,070,427,521,600
5. Step 5: Solve for x
   x = 447,070,427,521,600/9,691,814
6. Step 6: Final answer
   x = 46,128,663.58