Finding the Fourth Proportional to 11,515.82, 17,278.59 and 5,672.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,515.82 : 17,278.59 = 5,672.48 : x
2. Step 2: Convert to fraction form
   11,515.82/17,278.59 = 5,672.48/x
3. Step 3: Cross multiply
   11,515.82x = 17,278.59 × 5,672.48
4. Step 4: Simplify right side
   11,515.82x = 98,012,456.20
5. Step 5: Solve for x
   x = 98,012,456.20/11,515.82
6. Step 6: Final answer
   x = 8,511.11