Finding the Third Proportional to 42.19 and 61.59

Step by Step Solution

1. Step 1: Write the proportion equation
   42.19 : 61.59 = 61.59 : x
2. Step 2: Convert to fraction form
   42.19/61.59 = 61.59/x
3. Step 3: Cross multiply
   42.19x = 61.59 × 61.59
4. Step 4: Simplify right side
   42.19x = 3,793.79
5. Step 5: Solve for x
   x = 3,793.79/42.19
6. Step 6: Final answer
   x = 89.93