Finding the Fourth Proportional to 28.33, 42.51 and 28.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28.33 : 42.51 = 28.10 : x
2. Step 2: Convert to fraction form
   28.33/42.51 = 28.10/x
3. Step 3: Cross multiply
   28.33x = 42.51 × 28.10
4. Step 4: Simplify right side
   28.33x = 1,194.74
5. Step 5: Solve for x
   x = 1,194.74/28.33
6. Step 6: Final answer
   x = 42.18