Finding the Fourth Proportional to 17,815.13, 24,585.39 and 9,858.09

Step by Step Solution

1. Step 1: Write the proportion equation
   17,815.13 : 24,585.39 = 9,858.09 : x
2. Step 2: Convert to fraction form
   17,815.13/24,585.39 = 9,858.09/x
3. Step 3: Cross multiply
   17,815.13x = 24,585.39 × 9,858.09
4. Step 4: Simplify right side
   17,815.13x = 242,364,987.31
5. Step 5: Solve for x
   x = 242,364,987.31/17,815.13
6. Step 6: Final answer
   x = 13,604.45