Finding the Third Proportional to 405.50 and 935.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405.50 : 935.50 = 935.50 : x
2. Step 2: Convert to fraction form
   405.50/935.50 = 935.50/x
3. Step 3: Cross multiply
   405.50x = 935.50 × 935.50
4. Step 4: Simplify right side
   405.50x = 875,160.25
5. Step 5: Solve for x
   x = 875,160.25/405.50
6. Step 6: Final answer
   x = 2,158.23