Finding the Fourth Proportional to 11,868.72, 17,797.28 and 6,939.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,868.72 : 17,797.28 = 6,939.60 : x
2. Step 2: Convert to fraction form
   11,868.72/17,797.28 = 6,939.60/x
3. Step 3: Cross multiply
   11,868.72x = 17,797.28 × 6,939.60
4. Step 4: Simplify right side
   11,868.72x = 123,506,004.29
5. Step 5: Solve for x
   x = 123,506,004.29/11,868.72
6. Step 6: Final answer
   x = 10,406.01