Finding the Fourth Proportional to 11,709.42, 17,561.34 and 4,309.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,709.42 : 17,561.34 = 4,309.89 : x
2. Step 2: Convert to fraction form
   11,709.42/17,561.34 = 4,309.89/x
3. Step 3: Cross multiply
   11,709.42x = 17,561.34 × 4,309.89
4. Step 4: Simplify right side
   11,709.42x = 75,687,443.65
5. Step 5: Solve for x
   x = 75,687,443.65/11,709.42
6. Step 6: Final answer
   x = 6,463.81