Finding the Fourth Proportional to 111.57, 167.39 and 53.01

Step by Step Solution

1. Step 1: Write the proportion equation
   111.57 : 167.39 = 53.01 : x
2. Step 2: Convert to fraction form
   111.57/167.39 = 53.01/x
3. Step 3: Cross multiply
   111.57x = 167.39 × 53.01
4. Step 4: Simplify right side
   111.57x = 8,873.34
5. Step 5: Solve for x
   x = 8,873.34/111.57
6. Step 6: Final answer
   x = 79.53