Finding the Fourth Proportional to 71.16, 98.18 and 42.03

Step by Step Solution

1. Step 1: Write the proportion equation
   71.16 : 98.18 = 42.03 : x
2. Step 2: Convert to fraction form
   71.16/98.18 = 42.03/x
3. Step 3: Cross multiply
   71.16x = 98.18 × 42.03
4. Step 4: Simplify right side
   71.16x = 4,126.51
5. Step 5: Solve for x
   x = 4,126.51/71.16
6. Step 6: Final answer
   x = 57.99