Finding the Third Proportional to 9,691,830 and 21,144,078

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,830 : 21,144,078 = 21,144,078 : x
2. Step 2: Convert to fraction form
   9,691,830/21,144,078 = 21,144,078/x
3. Step 3: Cross multiply
   9,691,830x = 21,144,078 × 21,144,078
4. Step 4: Simplify right side
   9,691,830x = 447,072,034,470,084
5. Step 5: Solve for x
   x = 447,072,034,470,084/9,691,830
6. Step 6: Final answer
   x = 46,128,753.24