Finding the Fourth Proportional to 11,719.67, 17,577.51 and 5,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,719.67 : 17,577.51 = 5,144.09 : x
2. Step 2: Convert to fraction form
   11,719.67/17,577.51 = 5,144.09/x
3. Step 3: Cross multiply
   11,719.67x = 17,577.51 × 5,144.09
4. Step 4: Simplify right side
   11,719.67x = 90,420,293.42
5. Step 5: Solve for x
   x = 90,420,293.42/11,719.67
6. Step 6: Final answer
   x = 7,715.26