Finding the Fourth Proportional to 51.98, 71.69 and 38.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51.98 : 71.69 = 38.18 : x
2. Step 2: Convert to fraction form
   51.98/71.69 = 38.18/x
3. Step 3: Cross multiply
   51.98x = 71.69 × 38.18
4. Step 4: Simplify right side
   51.98x = 2,736.71
5. Step 5: Solve for x
   x = 2,736.71/51.98
6. Step 6: Final answer
   x = 52.65