Finding the Third Proportional to 131.75 and 342.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131.75 : 342.50 = 342.50 : x
2. Step 2: Convert to fraction form
   131.75/342.50 = 342.50/x
3. Step 3: Cross multiply
   131.75x = 342.50 × 342.50
4. Step 4: Simplify right side
   131.75x = 117,306.25
5. Step 5: Solve for x
   x = 117,306.25/131.75
6. Step 6: Final answer
   x = 890.37