Finding the Third Proportional to 9,978,472 and 21,552,320

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978,472 : 21,552,320 = 21,552,320 : x
2. Step 2: Convert to fraction form
   9,978,472/21,552,320 = 21,552,320/x
3. Step 3: Cross multiply
   9,978,472x = 21,552,320 × 21,552,320
4. Step 4: Simplify right side
   9,978,472x = 464,502,497,382,400
5. Step 5: Solve for x
   x = 464,502,497,382,400/9,978,472
6. Step 6: Final answer
   x = 46,550,463.58