Finding the Fourth Proportional to 111.60, 167.38 and 43.10

Step by Step Solution

1. Step 1: Write the proportion equation
   111.60 : 167.38 = 43.10 : x
2. Step 2: Convert to fraction form
   111.60/167.38 = 43.10/x
3. Step 3: Cross multiply
   111.60x = 167.38 × 43.10
4. Step 4: Simplify right side
   111.60x = 7,213.86
5. Step 5: Solve for x
   x = 7,213.86/111.60
6. Step 6: Final answer
   x = 64.64