Finding the Fourth Proportional to 9,939.79, 13,718.15 and 5,748.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,939.79 : 13,718.15 = 5,748.04 : x
2. Step 2: Convert to fraction form
   9,939.79/13,718.15 = 5,748.04/x
3. Step 3: Cross multiply
   9,939.79x = 13,718.15 × 5,748.04
4. Step 4: Simplify right side
   9,939.79x = 78,852,474.93
5. Step 5: Solve for x
   x = 78,852,474.93/9,939.79
6. Step 6: Final answer
   x = 7,933.01