Finding the Fourth Proportional to 17,786.88, 24,526.80 and 12,480

Step by Step Solution

1. Step 1: Write the proportion equation
   17,786.88 : 24,526.80 = 12,480 : x
2. Step 2: Convert to fraction form
   17,786.88/24,526.80 = 12,480/x
3. Step 3: Cross multiply
   17,786.88x = 24,526.80 × 12,480
4. Step 4: Simplify right side
   17,786.88x = 306,094,464
5. Step 5: Solve for x
   x = 306,094,464/17,786.88
6. Step 6: Final answer
   x = 17,209.00