Finding the Fourth Proportional to 9,940.48, 13,718.17 and 5,691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,940.48 : 13,718.17 = 5,691.56 : x
2. Step 2: Convert to fraction form
   9,940.48/13,718.17 = 5,691.56/x
3. Step 3: Cross multiply
   9,940.48x = 13,718.17 × 5,691.56
4. Step 4: Simplify right side
   9,940.48x = 78,077,719.05
5. Step 5: Solve for x
   x = 78,077,719.05/9,940.48
6. Step 6: Final answer
   x = 7,854.53