Finding the Third Proportional to 3,990,984 and 8,754,640

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,984 : 8,754,640 = 8,754,640 : x
2. Step 2: Convert to fraction form
   3,990,984/8,754,640 = 8,754,640/x
3. Step 3: Cross multiply
   3,990,984x = 8,754,640 × 8,754,640
4. Step 4: Simplify right side
   3,990,984x = 76,643,721,529,600
5. Step 5: Solve for x
   x = 76,643,721,529,600/3,990,984
6. Step 6: Final answer
   x = 19,204,216.69