Finding the Fourth Proportional to 17,756.68, 24,513.78 and 12,940.60

Step by Step Solution

1. Step 1: Write the proportion equation
   17,756.68 : 24,513.78 = 12,940.60 : x
2. Step 2: Convert to fraction form
   17,756.68/24,513.78 = 12,940.60/x
3. Step 3: Cross multiply
   17,756.68x = 24,513.78 × 12,940.60
4. Step 4: Simplify right side
   17,756.68x = 317,223,021.47
5. Step 5: Solve for x
   x = 317,223,021.47/17,756.68
6. Step 6: Final answer
   x = 17,865.00