Finding the Third Proportional to 59.75 and 129.25

Step by Step Solution

1. Step 1: Write the proportion equation
   59.75 : 129.25 = 129.25 : x
2. Step 2: Convert to fraction form
   59.75/129.25 = 129.25/x
3. Step 3: Cross multiply
   59.75x = 129.25 × 129.25
4. Step 4: Simplify right side
   59.75x = 16,705.56
5. Step 5: Solve for x
   x = 16,705.56/59.75
6. Step 6: Final answer
   x = 279.59