Finding the Third Proportional to 91.50 and 130.88

Step by Step Solution

1. Step 1: Write the proportion equation
   91.50 : 130.88 = 130.88 : x
2. Step 2: Convert to fraction form
   91.50/130.88 = 130.88/x
3. Step 3: Cross multiply
   91.50x = 130.88 × 130.88
4. Step 4: Simplify right side
   91.50x = 17,128.27
5. Step 5: Solve for x
   x = 17,128.27/91.50
6. Step 6: Final answer
   x = 187.19