Finding the Fourth Proportional to 9,945.36, 13,724.31 and 5,696.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.36 : 13,724.31 = 5,696.28 : x
2. Step 2: Convert to fraction form
   9,945.36/13,724.31 = 5,696.28/x
3. Step 3: Cross multiply
   9,945.36x = 13,724.31 × 5,696.28
4. Step 4: Simplify right side
   9,945.36x = 78,177,512.57
5. Step 5: Solve for x
   x = 78,177,512.57/9,945.36
6. Step 6: Final answer
   x = 7,860.70