Finding the Fourth Proportional to 17,121.24, 23,611.50 and 13,142.52

Step by Step Solution

1. Step 1: Write the proportion equation
   17,121.24 : 23,611.50 = 13,142.52 : x
2. Step 2: Convert to fraction form
   17,121.24/23,611.50 = 13,142.52/x
3. Step 3: Cross multiply
   17,121.24x = 23,611.50 × 13,142.52
4. Step 4: Simplify right side
   17,121.24x = 310,314,610.98
5. Step 5: Solve for x
   x = 310,314,610.98/17,121.24
6. Step 6: Final answer
   x = 18,124.54