Finding the Fourth Proportional to 11,405.88, 17,106.38 and 8,771.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,405.88 : 17,106.38 = 8,771.76 : x
2. Step 2: Convert to fraction form
   11,405.88/17,106.38 = 8,771.76/x
3. Step 3: Cross multiply
   11,405.88x = 17,106.38 × 8,771.76
4. Step 4: Simplify right side
   11,405.88x = 150,053,059.83
5. Step 5: Solve for x
   x = 150,053,059.83/11,405.88
6. Step 6: Final answer
   x = 13,155.76