Finding the Third Proportional to 386,395 and 591,066

Step by Step Solution

1. Step 1: Write the proportion equation
   386,395 : 591,066 = 591,066 : x
2. Step 2: Convert to fraction form
   386,395/591,066 = 591,066/x
3. Step 3: Cross multiply
   386,395x = 591,066 × 591,066
4. Step 4: Simplify right side
   386,395x = 349,359,016,356
5. Step 5: Solve for x
   x = 349,359,016,356/386,395
6. Step 6: Final answer
   x = 904,149.94