Finding the Fourth Proportional to 11,891.34, 16,410.06 and 7,706.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,891.34 : 16,410.06 = 7,706.88 : x
2. Step 2: Convert to fraction form
   11,891.34/16,410.06 = 7,706.88/x
3. Step 3: Cross multiply
   11,891.34x = 16,410.06 × 7,706.88
4. Step 4: Simplify right side
   11,891.34x = 126,470,363.21
5. Step 5: Solve for x
   x = 126,470,363.21/11,891.34
6. Step 6: Final answer
   x = 10,635.50