Finding the Third Proportional to 218,166 and 320,066

Step by Step Solution

1. Step 1: Write the proportion equation
   218,166 : 320,066 = 320,066 : x
2. Step 2: Convert to fraction form
   218,166/320,066 = 320,066/x
3. Step 3: Cross multiply
   218,166x = 320,066 × 320,066
4. Step 4: Simplify right side
   218,166x = 102,442,244,356
5. Step 5: Solve for x
   x = 102,442,244,356/218,166
6. Step 6: Final answer
   x = 469,561.00