Finding the Fourth Proportional to 7,131.25, 9,840.89 and 3,944.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.25 : 9,840.89 = 3,944.50 : x
2. Step 2: Convert to fraction form
   7,131.25/9,840.89 = 3,944.50/x
3. Step 3: Cross multiply
   7,131.25x = 9,840.89 × 3,944.50
4. Step 4: Simplify right side
   7,131.25x = 38,817,390.61
5. Step 5: Solve for x
   x = 38,817,390.61/7,131.25
6. Step 6: Final answer
   x = 5,443.28