Finding the Fourth Proportional to 17,815.17, 24,584.81 and 9,857.21

Step by Step Solution

1. Step 1: Write the proportion equation
   17,815.17 : 24,584.81 = 9,857.21 : x
2. Step 2: Convert to fraction form
   17,815.17/24,584.81 = 9,857.21/x
3. Step 3: Cross multiply
   17,815.17x = 24,584.81 × 9,857.21
4. Step 4: Simplify right side
   17,815.17x = 242,337,462.77
5. Step 5: Solve for x
   x = 242,337,462.77/17,815.17
6. Step 6: Final answer
   x = 13,602.87