Finding the Third Proportional to 3,990,943 and 8,754,434

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,943 : 8,754,434 = 8,754,434 : x
2. Step 2: Convert to fraction form
   3,990,943/8,754,434 = 8,754,434/x
3. Step 3: Cross multiply
   3,990,943x = 8,754,434 × 8,754,434
4. Step 4: Simplify right side
   3,990,943x = 76,640,114,660,356
5. Step 5: Solve for x
   x = 76,640,114,660,356/3,990,943
6. Step 6: Final answer
   x = 19,203,510.21