Finding the Third Proportional to 9,778,974 and 21,240,810

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778,974 : 21,240,810 = 21,240,810 : x
2. Step 2: Convert to fraction form
   9,778,974/21,240,810 = 21,240,810/x
3. Step 3: Cross multiply
   9,778,974x = 21,240,810 × 21,240,810
4. Step 4: Simplify right side
   9,778,974x = 451,172,009,456,100
5. Step 5: Solve for x
   x = 451,172,009,456,100/9,778,974
6. Step 6: Final answer
   x = 46,136,947.44