Finding the Fourth Proportional to 17,143.54, 23,656.53 and 10,855.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,143.54 : 23,656.53 = 10,855.78 : x
2. Step 2: Convert to fraction form
   17,143.54/23,656.53 = 10,855.78/x
3. Step 3: Cross multiply
   17,143.54x = 23,656.53 × 10,855.78
4. Step 4: Simplify right side
   17,143.54x = 256,810,085.24
5. Step 5: Solve for x
   x = 256,810,085.24/17,143.54
6. Step 6: Final answer
   x = 14,979.99