Finding the Fourth Proportional to 7,137.31, 9,849.50 and 3,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,137.31 : 9,849.50 = 3,993.50 : x
2. Step 2: Convert to fraction form
   7,137.31/9,849.50 = 3,993.50/x
3. Step 3: Cross multiply
   7,137.31x = 9,849.50 × 3,993.50
4. Step 4: Simplify right side
   7,137.31x = 39,333,978.25
5. Step 5: Solve for x
   x = 39,333,978.25/7,137.31
6. Step 6: Final answer
   x = 5,511.04