Finding the Fourth Proportional to 38.93, 53.71 and 28.00

Step by Step Solution

1. Step 1: Write the proportion equation
   38.93 : 53.71 = 28.00 : x
2. Step 2: Convert to fraction form
   38.93/53.71 = 28.00/x
3. Step 3: Cross multiply
   38.93x = 53.71 × 28.00
4. Step 4: Simplify right side
   38.93x = 1,503.73
5. Step 5: Solve for x
   x = 1,503.73/38.93
6. Step 6: Final answer
   x = 38.63