Finding the Fourth Proportional to 11,719.68, 17,581.12 and 3,926.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,719.68 : 17,581.12 = 3,926.72 : x
2. Step 2: Convert to fraction form
   11,719.68/17,581.12 = 3,926.72/x
3. Step 3: Cross multiply
   11,719.68x = 17,581.12 × 3,926.72
4. Step 4: Simplify right side
   11,719.68x = 69,036,135.53
5. Step 5: Solve for x
   x = 69,036,135.53/11,719.68
6. Step 6: Final answer
   x = 5,890.62