Finding the Fourth Proportional to 71.71, 107.59 and 42.83

Step by Step Solution

1. Step 1: Write the proportion equation
   71.71 : 107.59 = 42.83 : x
2. Step 2: Convert to fraction form
   71.71/107.59 = 42.83/x
3. Step 3: Cross multiply
   71.71x = 107.59 × 42.83
4. Step 4: Simplify right side
   71.71x = 4,608.24
5. Step 5: Solve for x
   x = 4,608.24/71.71
6. Step 6: Final answer
   x = 64.26