Finding the Third Proportional to 218,168 and 320,068

Step by Step Solution

1. Step 1: Write the proportion equation
   218,168 : 320,068 = 320,068 : x
2. Step 2: Convert to fraction form
   218,168/320,068 = 320,068/x
3. Step 3: Cross multiply
   218,168x = 320,068 × 320,068
4. Step 4: Simplify right side
   218,168x = 102,443,524,624
5. Step 5: Solve for x
   x = 102,443,524,624/218,168
6. Step 6: Final answer
   x = 469,562.56