Finding the Fourth Proportional to 11,426.76, 17,131.86 and 7,719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,426.76 : 17,131.86 = 7,719.72 : x
2. Step 2: Convert to fraction form
   11,426.76/17,131.86 = 7,719.72/x
3. Step 3: Cross multiply
   11,426.76x = 17,131.86 × 7,719.72
4. Step 4: Simplify right side
   11,426.76x = 132,253,162.28
5. Step 5: Solve for x
   x = 132,253,162.28/11,426.76
6. Step 6: Final answer
   x = 11,573.99