Finding the Fourth Proportional to 112.59, 168.69 and 74.10

Step by Step Solution

1. Step 1: Write the proportion equation
   112.59 : 168.69 = 74.10 : x
2. Step 2: Convert to fraction form
   112.59/168.69 = 74.10/x
3. Step 3: Cross multiply
   112.59x = 168.69 × 74.10
4. Step 4: Simplify right side
   112.59x = 12,499.93
5. Step 5: Solve for x
   x = 12,499.93/112.59
6. Step 6: Final answer
   x = 111.02