Finding the Fourth Proportional to 11,760.64, 17,643.57 and 3,969.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,760.64 : 17,643.57 = 3,969.25 : x
2. Step 2: Convert to fraction form
   11,760.64/17,643.57 = 3,969.25/x
3. Step 3: Cross multiply
   11,760.64x = 17,643.57 × 3,969.25
4. Step 4: Simplify right side
   11,760.64x = 70,031,740.22
5. Step 5: Solve for x
   x = 70,031,740.22/11,760.64
6. Step 6: Final answer
   x = 5,954.76