Finding the Third Proportional to 149,799 and 318,066

Step by Step Solution

1. Step 1: Write the proportion equation
   149,799 : 318,066 = 318,066 : x
2. Step 2: Convert to fraction form
   149,799/318,066 = 318,066/x
3. Step 3: Cross multiply
   149,799x = 318,066 × 318,066
4. Step 4: Simplify right side
   149,799x = 101,165,980,356
5. Step 5: Solve for x
   x = 101,165,980,356/149,799
6. Step 6: Final answer
   x = 675,344.83