Finding the Fourth Proportional to 5,171.98, 7,788.37 and 3,721.24

Step by Step Solution

1. Step 1: Write the proportion equation
   5,171.98 : 7,788.37 = 3,721.24 : x
2. Step 2: Convert to fraction form
   5,171.98/7,788.37 = 3,721.24/x
3. Step 3: Cross multiply
   5,171.98x = 7,788.37 × 3,721.24
4. Step 4: Simplify right side
   5,171.98x = 28,982,393.98
5. Step 5: Solve for x
   x = 28,982,393.98/5,171.98
6. Step 6: Final answer
   x = 5,603.73