Finding the Third Proportional to 10,921,902 and 18,200,986

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921,902 : 18,200,986 = 18,200,986 : x
2. Step 2: Convert to fraction form
   10,921,902/18,200,986 = 18,200,986/x
3. Step 3: Cross multiply
   10,921,902x = 18,200,986 × 18,200,986
4. Step 4: Simplify right side
   10,921,902x = 331,275,891,372,196
5. Step 5: Solve for x
   x = 331,275,891,372,196/10,921,902
6. Step 6: Final answer
   x = 30,331,337.10