Finding the Fourth Proportional to 11,424.87, 17,143.25 and 5,189.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,424.87 : 17,143.25 = 5,189.31 : x
2. Step 2: Convert to fraction form
   11,424.87/17,143.25 = 5,189.31/x
3. Step 3: Cross multiply
   11,424.87x = 17,143.25 × 5,189.31
4. Step 4: Simplify right side
   11,424.87x = 88,961,612.71
5. Step 5: Solve for x
   x = 88,961,612.71/11,424.87
6. Step 6: Final answer
   x = 7,786.66