Finding the Fourth Proportional to 9,939.56, 13,716.69 and 5,402.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,939.56 : 13,716.69 = 5,402.29 : x
2. Step 2: Convert to fraction form
   9,939.56/13,716.69 = 5,402.29/x
3. Step 3: Cross multiply
   9,939.56x = 13,716.69 × 5,402.29
4. Step 4: Simplify right side
   9,939.56x = 74,101,452.53
5. Step 5: Solve for x
   x = 74,101,452.53/9,939.56
6. Step 6: Final answer
   x = 7,455.20