Finding the Fourth Proportional to 17,288.37, 25,931.43 and 8,515.53

Step by Step Solution

1. Step 1: Write the proportion equation
   17,288.37 : 25,931.43 = 8,515.53 : x
2. Step 2: Convert to fraction form
   17,288.37/25,931.43 = 8,515.53/x
3. Step 3: Cross multiply
   17,288.37x = 25,931.43 × 8,515.53
4. Step 4: Simplify right side
   17,288.37x = 220,819,870.11
5. Step 5: Solve for x
   x = 220,819,870.11/17,288.37
6. Step 6: Final answer
   x = 12,772.74