Finding the Third Proportional to 389,066 and 916,025

Step by Step Solution

1. Step 1: Write the proportion equation
   389,066 : 916,025 = 916,025 : x
2. Step 2: Convert to fraction form
   389,066/916,025 = 916,025/x
3. Step 3: Cross multiply
   389,066x = 916,025 × 916,025
4. Step 4: Simplify right side
   389,066x = 839,101,800,625
5. Step 5: Solve for x
   x = 839,101,800,625/389,066
6. Step 6: Final answer
   x = 2,156,708.12