Finding the Fourth Proportional to 11,709.61, 17,565.33 and 3,389.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,709.61 : 17,565.33 = 3,389.75 : x
2. Step 2: Convert to fraction form
   11,709.61/17,565.33 = 3,389.75/x
3. Step 3: Cross multiply
   11,709.61x = 17,565.33 × 3,389.75
4. Step 4: Simplify right side
   11,709.61x = 59,542,020.74
5. Step 5: Solve for x
   x = 59,542,020.74/11,709.61
6. Step 6: Final answer
   x = 5,084.89