Finding the Fourth Proportional to 32.20, 42.17 and 32.20

Step by Step Solution

1. Step 1: Write the proportion equation
   32.20 : 42.17 = 32.20 : x
2. Step 2: Convert to fraction form
   32.20/42.17 = 32.20/x
3. Step 3: Cross multiply
   32.20x = 42.17 × 32.20
4. Step 4: Simplify right side
   32.20x = 1,357.87
5. Step 5: Solve for x
   x = 1,357.87/32.20
6. Step 6: Final answer
   x = 42.17