Finding the Fourth Proportional to 11,728.28, 17,588.16 and 3,406.04

Step by Step Solution

1. Step 1: Write the proportion equation
   11,728.28 : 17,588.16 = 3,406.04 : x
2. Step 2: Convert to fraction form
   11,728.28/17,588.16 = 3,406.04/x
3. Step 3: Cross multiply
   11,728.28x = 17,588.16 × 3,406.04
4. Step 4: Simplify right side
   11,728.28x = 59,905,976.49
5. Step 5: Solve for x
   x = 59,905,976.49/11,728.28
6. Step 6: Final answer
   x = 5,107.82