Finding the Fourth Proportional to 7,348.25, 10,140.31 and 3,991.00

Step by Step Solution

1. Step 1: Write the proportion equation
   7,348.25 : 10,140.31 = 3,991.00 : x
2. Step 2: Convert to fraction form
   7,348.25/10,140.31 = 3,991.00/x
3. Step 3: Cross multiply
   7,348.25x = 10,140.31 × 3,991.00
4. Step 4: Simplify right side
   7,348.25x = 40,469,906.55
5. Step 5: Solve for x
   x = 40,469,906.55/7,348.25
6. Step 6: Final answer
   x = 5,507.42