Finding the Fourth Proportional to 11,772.01, 17,658.06 and 3,986.29

Step by Step Solution

1. Step 1: Write the proportion equation
   11,772.01 : 17,658.06 = 3,986.29 : x
2. Step 2: Convert to fraction form
   11,772.01/17,658.06 = 3,986.29/x
3. Step 3: Cross multiply
   11,772.01x = 17,658.06 × 3,986.29
4. Step 4: Simplify right side
   11,772.01x = 70,390,148.00
5. Step 5: Solve for x
   x = 70,390,148.00/11,772.01
6. Step 6: Final answer
   x = 5,979.45