Finding the Third Proportional to 158.50 and 331.25

Step by Step Solution

1. Step 1: Write the proportion equation
   158.50 : 331.25 = 331.25 : x
2. Step 2: Convert to fraction form
   158.50/331.25 = 331.25/x
3. Step 3: Cross multiply
   158.50x = 331.25 × 331.25
4. Step 4: Simplify right side
   158.50x = 109,726.56
5. Step 5: Solve for x
   x = 109,726.56/158.50
6. Step 6: Final answer
   x = 692.28