Finding the Fourth Proportional to 11,872.35, 17,806.10 and 4,081.77

Step by Step Solution

1. Step 1: Write the proportion equation
   11,872.35 : 17,806.10 = 4,081.77 : x
2. Step 2: Convert to fraction form
   11,872.35/17,806.10 = 4,081.77/x
3. Step 3: Cross multiply
   11,872.35x = 17,806.10 × 4,081.77
4. Step 4: Simplify right side
   11,872.35x = 72,680,384.39
5. Step 5: Solve for x
   x = 72,680,384.39/11,872.35
6. Step 6: Final answer
   x = 6,121.82