Finding the Fourth Proportional to 42.80, 64.18 and 24.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42.80 : 64.18 = 24.52 : x
2. Step 2: Convert to fraction form
   42.80/64.18 = 24.52/x
3. Step 3: Cross multiply
   42.80x = 64.18 × 24.52
4. Step 4: Simplify right side
   42.80x = 1,573.69
5. Step 5: Solve for x
   x = 1,573.69/42.80
6. Step 6: Final answer
   x = 36.77