Finding the Fourth Proportional to 11,871.36, 17,805.42 and 3,106.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,871.36 : 17,805.42 = 3,106.89 : x
2. Step 2: Convert to fraction form
   11,871.36/17,805.42 = 3,106.89/x
3. Step 3: Cross multiply
   11,871.36x = 17,805.42 × 3,106.89
4. Step 4: Simplify right side
   11,871.36x = 55,319,481.34
5. Step 5: Solve for x
   x = 55,319,481.34/11,871.36
6. Step 6: Final answer
   x = 4,659.91