Finding the Third Proportional to 218,955 and 329,404.50

Step by Step Solution

1. Step 1: Write the proportion equation
   218,955 : 329,404.50 = 329,404.50 : x
2. Step 2: Convert to fraction form
   218,955/329,404.50 = 329,404.50/x
3. Step 3: Cross multiply
   218,955x = 329,404.50 × 329,404.50
4. Step 4: Simplify right side
   218,955x = 108,507,324,620.25
5. Step 5: Solve for x
   x = 108,507,324,620.25/218,955
6. Step 6: Final answer
   x = 495,569.06