Finding the Fourth Proportional to 71.93, 99.23 and 42.42

Step by Step Solution

1. Step 1: Write the proportion equation
   71.93 : 99.23 = 42.42 : x
2. Step 2: Convert to fraction form
   71.93/99.23 = 42.42/x
3. Step 3: Cross multiply
   71.93x = 99.23 × 42.42
4. Step 4: Simplify right side
   71.93x = 4,209.12
5. Step 5: Solve for x
   x = 4,209.12/71.93
6. Step 6: Final answer
   x = 58.52