Finding the Fourth Proportional to 17,388.83, 23,990.04 and 12,862.35

Step by Step Solution

1. Step 1: Write the proportion equation
   17,388.83 : 23,990.04 = 12,862.35 : x
2. Step 2: Convert to fraction form
   17,388.83/23,990.04 = 12,862.35/x
3. Step 3: Cross multiply
   17,388.83x = 23,990.04 × 12,862.35
4. Step 4: Simplify right side
   17,388.83x = 308,568,290.99
5. Step 5: Solve for x
   x = 308,568,290.99/17,388.83
6. Step 6: Final answer
   x = 17,745.20