Finding the Third Proportional to 3,906,186 and 8,557,140

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906,186 : 8,557,140 = 8,557,140 : x
2. Step 2: Convert to fraction form
   3,906,186/8,557,140 = 8,557,140/x
3. Step 3: Cross multiply
   3,906,186x = 8,557,140 × 8,557,140
4. Step 4: Simplify right side
   3,906,186x = 73,224,644,979,600
5. Step 5: Solve for x
   x = 73,224,644,979,600/3,906,186
6. Step 6: Final answer
   x = 18,745,816.25