Finding the Fourth Proportional to 39,521.48, 54,540.72 and 21,617.54

Step by Step Solution

1. Step 1: Write the proportion equation
   39,521.48 : 54,540.72 = 21,617.54 : x
2. Step 2: Convert to fraction form
   39,521.48/54,540.72 = 21,617.54/x
3. Step 3: Cross multiply
   39,521.48x = 54,540.72 × 21,617.54
4. Step 4: Simplify right side
   39,521.48x = 1,179,036,196.23
5. Step 5: Solve for x
   x = 1,179,036,196.23/39,521.48
6. Step 6: Final answer
   x = 29,832.79