Finding the Fourth Proportional to 51.82, 71.51 and 31.10

Step by Step Solution

1. Step 1: Write the proportion equation
   51.82 : 71.51 = 31.10 : x
2. Step 2: Convert to fraction form
   51.82/71.51 = 31.10/x
3. Step 3: Cross multiply
   51.82x = 71.51 × 31.10
4. Step 4: Simplify right side
   51.82x = 2,223.45
5. Step 5: Solve for x
   x = 2,223.45/51.82
6. Step 6: Final answer
   x = 42.91