Finding the Fourth Proportional to 42.49, 58.69 and 36.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42.49 : 58.69 = 36.72 : x
2. Step 2: Convert to fraction form
   42.49/58.69 = 36.72/x
3. Step 3: Cross multiply
   42.49x = 58.69 × 36.72
4. Step 4: Simplify right side
   42.49x = 2,155.10
5. Step 5: Solve for x
   x = 2,155.10/42.49
6. Step 6: Final answer
   x = 50.72