Finding the Fourth Proportional to 74.34, 111.50 and 40.10

Step by Step Solution

1. Step 1: Write the proportion equation
   74.34 : 111.50 = 40.10 : x
2. Step 2: Convert to fraction form
   74.34/111.50 = 40.10/x
3. Step 3: Cross multiply
   74.34x = 111.50 × 40.10
4. Step 4: Simplify right side
   74.34x = 4,470.39
5. Step 5: Solve for x
   x = 4,470.39/74.34
6. Step 6: Final answer
   x = 60.13