Finding the Third Proportional to 338,800.50 and 496,890

Step by Step Solution

1. Step 1: Write the proportion equation
   338,800.50 : 496,890 = 496,890 : x
2. Step 2: Convert to fraction form
   338,800.50/496,890 = 496,890/x
3. Step 3: Cross multiply
   338,800.50x = 496,890 × 496,890
4. Step 4: Simplify right side
   338,800.50x = 246,899,672,100
5. Step 5: Solve for x
   x = 246,899,672,100/338,800.50
6. Step 6: Final answer
   x = 728,746.48