Finding the Fourth Proportional to 9,186.27, 13,779.10 and 3,992.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,186.27 : 13,779.10 = 3,992.15 : x
2. Step 2: Convert to fraction form
   9,186.27/13,779.10 = 3,992.15/x
3. Step 3: Cross multiply
   9,186.27x = 13,779.10 × 3,992.15
4. Step 4: Simplify right side
   9,186.27x = 55,008,234.07
5. Step 5: Solve for x
   x = 55,008,234.07/9,186.27
6. Step 6: Final answer
   x = 5,988.09