Finding the Fourth Proportional to 71.05, 106.31 and 38.83

Step by Step Solution

1. Step 1: Write the proportion equation
   71.05 : 106.31 = 38.83 : x
2. Step 2: Convert to fraction form
   71.05/106.31 = 38.83/x
3. Step 3: Cross multiply
   71.05x = 106.31 × 38.83
4. Step 4: Simplify right side
   71.05x = 4,127.82
5. Step 5: Solve for x
   x = 4,127.82/71.05
6. Step 6: Final answer
   x = 58.10