Finding the Fourth Proportional to 17,815.82, 24,586.34 and 9,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,815.82 : 24,586.34 = 9,858.78 : x
2. Step 2: Convert to fraction form
   17,815.82/24,586.34 = 9,858.78/x
3. Step 3: Cross multiply
   17,815.82x = 24,586.34 × 9,858.78
4. Step 4: Simplify right side
   17,815.82x = 242,391,267.77
5. Step 5: Solve for x
   x = 242,391,267.77/17,815.82
6. Step 6: Final answer
   x = 13,605.40