Finding the Fourth Proportional to 11,709.91, 17,567.63 and 3,390.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,709.91 : 17,567.63 = 3,390.12 : x
2. Step 2: Convert to fraction form
   11,709.91/17,567.63 = 3,390.12/x
3. Step 3: Cross multiply
   11,709.91x = 17,567.63 × 3,390.12
4. Step 4: Simplify right side
   11,709.91x = 59,556,373.82
5. Step 5: Solve for x
   x = 59,556,373.82/11,709.91
6. Step 6: Final answer
   x = 5,085.98