Finding the Fourth Proportional to 71.15, 98.18 and 42.04

Step by Step Solution

1. Step 1: Write the proportion equation
   71.15 : 98.18 = 42.04 : x
2. Step 2: Convert to fraction form
   71.15/98.18 = 42.04/x
3. Step 3: Cross multiply
   71.15x = 98.18 × 42.04
4. Step 4: Simplify right side
   71.15x = 4,127.00
5. Step 5: Solve for x
   x = 4,127.00/71.15
6. Step 6: Final answer
   x = 58.00