Finding the Third Proportional to 131.39 and 143.02

Step by Step Solution

1. Step 1: Write the proportion equation
   131.39 : 143.02 = 143.02 : x
2. Step 2: Convert to fraction form
   131.39/143.02 = 143.02/x
3. Step 3: Cross multiply
   131.39x = 143.02 × 143.02
4. Step 4: Simplify right side
   131.39x = 20,453.47
5. Step 5: Solve for x
   x = 20,453.47/131.39
6. Step 6: Final answer
   x = 155.67