Finding the Fourth Proportional to 11,406.69, 15,731.42 and 7,426.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,406.69 : 15,731.42 = 7,426.35 : x
2. Step 2: Convert to fraction form
   11,406.69/15,731.42 = 7,426.35/x
3. Step 3: Cross multiply
   11,406.69x = 15,731.42 × 7,426.35
4. Step 4: Simplify right side
   11,406.69x = 116,826,993.79
5. Step 5: Solve for x
   x = 116,826,993.79/11,406.69
6. Step 6: Final answer
   x = 10,241.97