Finding the Fourth Proportional to 90.48, 124.83 and 57.29

Step by Step Solution

1. Step 1: Write the proportion equation
   90.48 : 124.83 = 57.29 : x
2. Step 2: Convert to fraction form
   90.48/124.83 = 57.29/x
3. Step 3: Cross multiply
   90.48x = 124.83 × 57.29
4. Step 4: Simplify right side
   90.48x = 7,150.89
5. Step 5: Solve for x
   x = 7,150.89/90.48
6. Step 6: Final answer
   x = 79.03