Finding the Third Proportional to 3,945,564 and 8,480,700

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,564 : 8,480,700 = 8,480,700 : x
2. Step 2: Convert to fraction form
   3,945,564/8,480,700 = 8,480,700/x
3. Step 3: Cross multiply
   3,945,564x = 8,480,700 × 8,480,700
4. Step 4: Simplify right side
   3,945,564x = 71,922,272,490,000
5. Step 5: Solve for x
   x = 71,922,272,490,000/3,945,564
6. Step 6: Final answer
   x = 18,228,641.71