Finding the Third Proportional to 3,945,414 and 8,490,064

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,414 : 8,490,064 = 8,490,064 : x
2. Step 2: Convert to fraction form
   3,945,414/8,490,064 = 8,490,064/x
3. Step 3: Cross multiply
   3,945,414x = 8,490,064 × 8,490,064
4. Step 4: Simplify right side
   3,945,414x = 72,081,186,724,096
5. Step 5: Solve for x
   x = 72,081,186,724,096/3,945,414
6. Step 6: Final answer
   x = 18,269,612.95