Finding the Third Proportional to 59.95 and 90.56

Step by Step Solution

1. Step 1: Write the proportion equation
   59.95 : 90.56 = 90.56 : x
2. Step 2: Convert to fraction form
   59.95/90.56 = 90.56/x
3. Step 3: Cross multiply
   59.95x = 90.56 × 90.56
4. Step 4: Simplify right side
   59.95x = 8,201.57
5. Step 5: Solve for x
   x = 8,201.57/59.95
6. Step 6: Final answer
   x = 136.80