Finding the Fourth Proportional to 71.97, 99.30 and 42.46

Step by Step Solution

1. Step 1: Write the proportion equation
   71.97 : 99.30 = 42.46 : x
2. Step 2: Convert to fraction form
   71.97/99.30 = 42.46/x
3. Step 3: Cross multiply
   71.97x = 99.30 × 42.46
4. Step 4: Simplify right side
   71.97x = 4,215.78
5. Step 5: Solve for x
   x = 4,215.78/71.97
6. Step 6: Final answer
   x = 58.58