Finding the Fourth Proportional to 17,081.72, 25,638.58 and 10,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,081.72 : 25,638.58 = 10,520.72 : x
2. Step 2: Convert to fraction form
   17,081.72/25,638.58 = 10,520.72/x
3. Step 3: Cross multiply
   17,081.72x = 25,638.58 × 10,520.72
4. Step 4: Simplify right side
   17,081.72x = 269,736,321.38
5. Step 5: Solve for x
   x = 269,736,321.38/17,081.72
6. Step 6: Final answer
   x = 15,790.93