Finding the Third Proportional to 9,691,808 and 21,144,028

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,808 : 21,144,028 = 21,144,028 : x
2. Step 2: Convert to fraction form
   9,691,808/21,144,028 = 21,144,028/x
3. Step 3: Cross multiply
   9,691,808x = 21,144,028 × 21,144,028
4. Step 4: Simplify right side
   9,691,808x = 447,069,920,064,784
5. Step 5: Solve for x
   x = 447,069,920,064,784/9,691,808
6. Step 6: Final answer
   x = 46,128,639.78