Finding the Fourth Proportional to 90.08, 124.17 and 57.27

Step by Step Solution

1. Step 1: Write the proportion equation
   90.08 : 124.17 = 57.27 : x
2. Step 2: Convert to fraction form
   90.08/124.17 = 57.27/x
3. Step 3: Cross multiply
   90.08x = 124.17 × 57.27
4. Step 4: Simplify right side
   90.08x = 7,111.22
5. Step 5: Solve for x
   x = 7,111.22/90.08
6. Step 6: Final answer
   x = 78.95