Finding the Fourth Proportional to 74.58, 111.88 and 42.05

Step by Step Solution

1. Step 1: Write the proportion equation
   74.58 : 111.88 = 42.05 : x
2. Step 2: Convert to fraction form
   74.58/111.88 = 42.05/x
3. Step 3: Cross multiply
   74.58x = 111.88 × 42.05
4. Step 4: Simplify right side
   74.58x = 4,704.55
5. Step 5: Solve for x
   x = 4,704.55/74.58
6. Step 6: Final answer
   x = 63.08