Finding the Third Proportional to 287,955 and 396,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,955 : 396,940.50 = 396,940.50 : x
2. Step 2: Convert to fraction form
   287,955/396,940.50 = 396,940.50/x
3. Step 3: Cross multiply
   287,955x = 396,940.50 × 396,940.50
4. Step 4: Simplify right side
   287,955x = 157,561,760,540.25
5. Step 5: Solve for x
   x = 157,561,760,540.25/287,955
6. Step 6: Final answer
   x = 547,174.94