Finding the Fourth Proportional to 52.48, 72.33 and 42.15

Step by Step Solution

1. Step 1: Write the proportion equation
   52.48 : 72.33 = 42.15 : x
2. Step 2: Convert to fraction form
   52.48/72.33 = 42.15/x
3. Step 3: Cross multiply
   52.48x = 72.33 × 42.15
4. Step 4: Simplify right side
   52.48x = 3,048.71
5. Step 5: Solve for x
   x = 3,048.71/52.48
6. Step 6: Final answer
   x = 58.09