Finding the Third Proportional to 9,778,966 and 21,240,800

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,966 : 21,240,800 = 21,240,800 : x
2. Step 2: Convert to fraction form
   9,778,966/21,240,800 = 21,240,800/x
3. Step 3: Cross multiply
   9,778,966x = 21,240,800 × 21,240,800
4. Step 4: Simplify right side
   9,778,966x = 451,171,584,640,000
5. Step 5: Solve for x
   x = 451,171,584,640,000/9,778,966
6. Step 6: Final answer
   x = 46,136,941.74