Finding the Fourth Proportional to 11,776.55, 17,662.86 and 3,879.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,776.55 : 17,662.86 = 3,879.15 : x
2. Step 2: Convert to fraction form
   11,776.55/17,662.86 = 3,879.15/x
3. Step 3: Cross multiply
   11,776.55x = 17,662.86 × 3,879.15
4. Step 4: Simplify right side
   11,776.55x = 68,516,883.37
5. Step 5: Solve for x
   x = 68,516,883.37/11,776.55
6. Step 6: Final answer
   x = 5,818.08