Finding the Fourth Proportional to 12,086.48, 18,130.20 and 5,758.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.48 : 18,130.20 = 5,758.10 : x
2. Step 2: Convert to fraction form
   12,086.48/18,130.20 = 5,758.10/x
3. Step 3: Cross multiply
   12,086.48x = 18,130.20 × 5,758.10
4. Step 4: Simplify right side
   12,086.48x = 104,395,504.62
5. Step 5: Solve for x
   x = 104,395,504.62/12,086.48
6. Step 6: Final answer
   x = 8,637.38