Finding the Third Proportional to 9,195,978 and 21,677,486

Step by Step Solution

1. Step 1: Write the proportion equation
   9,195,978 : 21,677,486 = 21,677,486 : x
2. Step 2: Convert to fraction form
   9,195,978/21,677,486 = 21,677,486/x
3. Step 3: Cross multiply
   9,195,978x = 21,677,486 × 21,677,486
4. Step 4: Simplify right side
   9,195,978x = 469,913,399,280,196
5. Step 5: Solve for x
   x = 469,913,399,280,196/9,195,978
6. Step 6: Final answer
   x = 51,099,882.94