Finding the Fourth Proportional to 17,816.78, 24,588.63 and 9,861.57

Step by Step Solution

1. Step 1: Write the proportion equation
   17,816.78 : 24,588.63 = 9,861.57 : x
2. Step 2: Convert to fraction form
   17,816.78/24,588.63 = 9,861.57/x
3. Step 3: Cross multiply
   17,816.78x = 24,588.63 × 9,861.57
4. Step 4: Simplify right side
   17,816.78x = 242,482,495.95
5. Step 5: Solve for x
   x = 242,482,495.95/17,816.78
6. Step 6: Final answer
   x = 13,609.78