Finding the Fourth Proportional to 17,172.91, 25,896.00 and 16,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,172.91 : 25,896.00 = 16,938.72 : x
2. Step 2: Convert to fraction form
   17,172.91/25,896.00 = 16,938.72/x
3. Step 3: Cross multiply
   17,172.91x = 25,896.00 × 16,938.72
4. Step 4: Simplify right side
   17,172.91x = 438,645,156.64
5. Step 5: Solve for x
   x = 438,645,156.64/17,172.91
6. Step 6: Final answer
   x = 25,542.85