Finding the Fourth Proportional to 8,942.77, 12,341.60 and 5,166.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,942.77 : 12,341.60 = 5,166.10 : x
2. Step 2: Convert to fraction form
   8,942.77/12,341.60 = 5,166.10/x
3. Step 3: Cross multiply
   8,942.77x = 12,341.60 × 5,166.10
4. Step 4: Simplify right side
   8,942.77x = 63,757,879.31
5. Step 5: Solve for x
   x = 63,757,879.31/8,942.77
6. Step 6: Final answer
   x = 7,129.54