Finding the Third Proportional to 39.75 and 58.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39.75 : 58.50 = 58.50 : x
2. Step 2: Convert to fraction form
   39.75/58.50 = 58.50/x
3. Step 3: Cross multiply
   39.75x = 58.50 × 58.50
4. Step 4: Simplify right side
   39.75x = 3,422.25
5. Step 5: Solve for x
   x = 3,422.25/39.75
6. Step 6: Final answer
   x = 86.09