Finding the Fourth Proportional to 9,945.85, 13,724.33 and 5,912.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.85 : 13,724.33 = 5,912.36 : x
2. Step 2: Convert to fraction form
   9,945.85/13,724.33 = 5,912.36/x
3. Step 3: Cross multiply
   9,945.85x = 13,724.33 × 5,912.36
4. Step 4: Simplify right side
   9,945.85x = 81,143,111.10
5. Step 5: Solve for x
   x = 81,143,111.10/9,945.85
6. Step 6: Final answer
   x = 8,158.49