Finding the Fourth Proportional to 42.51, 58.63 and 33.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.51 : 58.63 = 33.18 : x
2. Step 2: Convert to fraction form
   42.51/58.63 = 33.18/x
3. Step 3: Cross multiply
   42.51x = 58.63 × 33.18
4. Step 4: Simplify right side
   42.51x = 1,945.10
5. Step 5: Solve for x
   x = 1,945.10/42.51
6. Step 6: Final answer
   x = 45.75