Finding the Third Proportional to 61.17 and 131.91

Step by Step Solution

1. Step 1: Write the proportion equation
   61.17 : 131.91 = 131.91 : x
2. Step 2: Convert to fraction form
   61.17/131.91 = 131.91/x
3. Step 3: Cross multiply
   61.17x = 131.91 × 131.91
4. Step 4: Simplify right side
   61.17x = 17,399.26
5. Step 5: Solve for x
   x = 17,399.26/61.17
6. Step 6: Final answer
   x = 284.43