Finding the Third Proportional to 148,089 and 318,066

Step by Step Solution

1. Step 1: Write the proportion equation
   148,089 : 318,066 = 318,066 : x
2. Step 2: Convert to fraction form
   148,089/318,066 = 318,066/x
3. Step 3: Cross multiply
   148,089x = 318,066 × 318,066
4. Step 4: Simplify right side
   148,089x = 101,165,980,356
5. Step 5: Solve for x
   x = 101,165,980,356/148,089
6. Step 6: Final answer
   x = 683,143.11