Finding the Fourth Proportional to 8,686.89, 13,019.86 and 4,000.49

Step by Step Solution

1. Step 1: Write the proportion equation
   8,686.89 : 13,019.86 = 4,000.49 : x
2. Step 2: Convert to fraction form
   8,686.89/13,019.86 = 4,000.49/x
3. Step 3: Cross multiply
   8,686.89x = 13,019.86 × 4,000.49
4. Step 4: Simplify right side
   8,686.89x = 52,085,754.63
5. Step 5: Solve for x
   x = 52,085,754.63/8,686.89
6. Step 6: Final answer
   x = 5,995.90