Finding the Third Proportional to 4,038,994 and 8,645,474

Step by Step Solution

1. Step 1: Write the proportion equation
   4,038,994 : 8,645,474 = 8,645,474 : x
2. Step 2: Convert to fraction form
   4,038,994/8,645,474 = 8,645,474/x
3. Step 3: Cross multiply
   4,038,994x = 8,645,474 × 8,645,474
4. Step 4: Simplify right side
   4,038,994x = 74,744,220,684,676
5. Step 5: Solve for x
   x = 74,744,220,684,676/4,038,994
6. Step 6: Final answer
   x = 18,505,652.81