Finding the Fourth Proportional to 42.76, 59.06 and 40.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.76 : 59.06 = 40.18 : x
2. Step 2: Convert to fraction form
   42.76/59.06 = 40.18/x
3. Step 3: Cross multiply
   42.76x = 59.06 × 40.18
4. Step 4: Simplify right side
   42.76x = 2,373.03
5. Step 5: Solve for x
   x = 2,373.03/42.76
6. Step 6: Final answer
   x = 55.50