Finding the Fourth Proportional to 111.15, 165.85 and 93.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111.15 : 165.85 = 93.15 : x
2. Step 2: Convert to fraction form
   111.15/165.85 = 93.15/x
3. Step 3: Cross multiply
   111.15x = 165.85 × 93.15
4. Step 4: Simplify right side
   111.15x = 15,448.69
5. Step 5: Solve for x
   x = 15,448.69/111.15
6. Step 6: Final answer
   x = 138.99