Finding the Third Proportional to 99.50 and 130.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99.50 : 130.25 = 130.25 : x
2. Step 2: Convert to fraction form
   99.50/130.25 = 130.25/x
3. Step 3: Cross multiply
   99.50x = 130.25 × 130.25
4. Step 4: Simplify right side
   99.50x = 16,965.06
5. Step 5: Solve for x
   x = 16,965.06/99.50
6. Step 6: Final answer
   x = 170.50