Finding the Fourth Proportional to 111.84, 154.31 and 62.71

Step by Step Solution

1. Step 1: Write the proportion equation
   111.84 : 154.31 = 62.71 : x
2. Step 2: Convert to fraction form
   111.84/154.31 = 62.71/x
3. Step 3: Cross multiply
   111.84x = 154.31 × 62.71
4. Step 4: Simplify right side
   111.84x = 9,676.78
5. Step 5: Solve for x
   x = 9,676.78/111.84
6. Step 6: Final answer
   x = 86.52