Finding the Fourth Proportional to 17,811.50, 24,579.60 and 12,716.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,811.50 : 24,579.60 = 12,716.42 : x
2. Step 2: Convert to fraction form
   17,811.50/24,579.60 = 12,716.42/x
3. Step 3: Cross multiply
   17,811.50x = 24,579.60 × 12,716.42
4. Step 4: Simplify right side
   17,811.50x = 312,564,517.03
5. Step 5: Solve for x
   x = 312,564,517.03/17,811.50
6. Step 6: Final answer
   x = 17,548.47