Finding the Fourth Proportional to 71.47, 98.61 and 42.34

Step by Step Solution

1. Step 1: Write the proportion equation
   71.47 : 98.61 = 42.34 : x
2. Step 2: Convert to fraction form
   71.47/98.61 = 42.34/x
3. Step 3: Cross multiply
   71.47x = 98.61 × 42.34
4. Step 4: Simplify right side
   71.47x = 4,175.15
5. Step 5: Solve for x
   x = 4,175.15/71.47
6. Step 6: Final answer
   x = 58.42