Finding the Fourth Proportional to 71.92, 99.25 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   71.92 : 99.25 = 42.42 : x
2. Step 2: Convert to fraction form
   71.92/99.25 = 42.42/x
3. Step 3: Cross multiply
   71.92x = 99.25 × 42.42
4. Step 4: Simplify right side
   71.92x = 4,210.19
5. Step 5: Solve for x
   x = 4,210.19/71.92
6. Step 6: Final answer
   x = 58.54