Finding the Fourth Proportional to 90.24, 124.55 and 57.52

Step by Step Solution

1. Step 1: Write the proportion equation
   90.24 : 124.55 = 57.52 : x
2. Step 2: Convert to fraction form
   90.24/124.55 = 57.52/x
3. Step 3: Cross multiply
   90.24x = 124.55 × 57.52
4. Step 4: Simplify right side
   90.24x = 7,164.12
5. Step 5: Solve for x
   x = 7,164.12/90.24
6. Step 6: Final answer
   x = 79.39