Finding the Fourth Proportional to 8,085.76, 12,131.60 and 3,406.94

Step by Step Solution

1. Step 1: Write the proportion equation
   8,085.76 : 12,131.60 = 3,406.94 : x
2. Step 2: Convert to fraction form
   8,085.76/12,131.60 = 3,406.94/x
3. Step 3: Cross multiply
   8,085.76x = 12,131.60 × 3,406.94
4. Step 4: Simplify right side
   8,085.76x = 41,331,633.30
5. Step 5: Solve for x
   x = 41,331,633.30/8,085.76
6. Step 6: Final answer
   x = 5,111.66