Finding the Third Proportional to 3,945,392 and 8,490,023

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,392 : 8,490,023 = 8,490,023 : x
2. Step 2: Convert to fraction form
   3,945,392/8,490,023 = 8,490,023/x
3. Step 3: Cross multiply
   3,945,392x = 8,490,023 × 8,490,023
4. Step 4: Simplify right side
   3,945,392x = 72,080,490,540,529
5. Step 5: Solve for x
   x = 72,080,490,540,529/3,945,392
6. Step 6: Final answer
   x = 18,269,538.37