Finding the Fourth Proportional to 111.82, 167.71 and 47.70

Step by Step Solution

1. Step 1: Write the proportion equation
   111.82 : 167.71 = 47.70 : x
2. Step 2: Convert to fraction form
   111.82/167.71 = 47.70/x
3. Step 3: Cross multiply
   111.82x = 167.71 × 47.70
4. Step 4: Simplify right side
   111.82x = 7,999.77
5. Step 5: Solve for x
   x = 7,999.77/111.82
6. Step 6: Final answer
   x = 71.54