Finding the Third Proportional to 218,454 and 295,144

Step by Step Solution

1. Step 1: Write the proportion equation
   218,454 : 295,144 = 295,144 : x
2. Step 2: Convert to fraction form
   218,454/295,144 = 295,144/x
3. Step 3: Cross multiply
   218,454x = 295,144 × 295,144
4. Step 4: Simplify right side
   218,454x = 87,109,980,736
5. Step 5: Solve for x
   x = 87,109,980,736/218,454
6. Step 6: Final answer
   x = 398,756.63