Finding the Fourth Proportional to 11,884.88, 17,829.76 and 3,988.20

Step by Step Solution

1. Step 1: Write the proportion equation
   11,884.88 : 17,829.76 = 3,988.20 : x
2. Step 2: Convert to fraction form
   11,884.88/17,829.76 = 3,988.20/x
3. Step 3: Cross multiply
   11,884.88x = 17,829.76 × 3,988.20
4. Step 4: Simplify right side
   11,884.88x = 71,108,648.83
5. Step 5: Solve for x
   x = 71,108,648.83/11,884.88
6. Step 6: Final answer
   x = 5,983.12