Finding the Third Proportional to 131.47 and 287.14

Step by Step Solution

1. Step 1: Write the proportion equation
   131.47 : 287.14 = 287.14 : x
2. Step 2: Convert to fraction form
   131.47/287.14 = 287.14/x
3. Step 3: Cross multiply
   131.47x = 287.14 × 287.14
4. Step 4: Simplify right side
   131.47x = 82,448.62
5. Step 5: Solve for x
   x = 82,448.62/131.47
6. Step 6: Final answer
   x = 627.14