Finding the Third Proportional to 220,456.50 and 329,826

Step by Step Solution

1. Step 1: Write the proportion equation
   220,456.50 : 329,826 = 329,826 : x
2. Step 2: Convert to fraction form
   220,456.50/329,826 = 329,826/x
3. Step 3: Cross multiply
   220,456.50x = 329,826 × 329,826
4. Step 4: Simplify right side
   220,456.50x = 108,785,190,276
5. Step 5: Solve for x
   x = 108,785,190,276/220,456.50
6. Step 6: Final answer
   x = 493,454.22