Finding the Fourth Proportional to 9,939.94, 13,717.23 and 5,402.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,939.94 : 13,717.23 = 5,402.63 : x
2. Step 2: Convert to fraction form
   9,939.94/13,717.23 = 5,402.63/x
3. Step 3: Cross multiply
   9,939.94x = 13,717.23 × 5,402.63
4. Step 4: Simplify right side
   9,939.94x = 74,109,022.72
5. Step 5: Solve for x
   x = 74,109,022.72/9,939.94
6. Step 6: Final answer
   x = 7,455.68