Finding the Fourth Proportional to 12,087.48, 18,131.70 and 5,759.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.48 : 18,131.70 = 5,759.10 : x
2. Step 2: Convert to fraction form
   12,087.48/18,131.70 = 5,759.10/x
3. Step 3: Cross multiply
   12,087.48x = 18,131.70 × 5,759.10
4. Step 4: Simplify right side
   12,087.48x = 104,422,273.47
5. Step 5: Solve for x
   x = 104,422,273.47/12,087.48
6. Step 6: Final answer
   x = 8,638.88