Finding the Fourth Proportional to 23,170.78, 31,975.71 and 12,560.43

Step by Step Solution

1. Step 1: Write the proportion equation
   23,170.78 : 31,975.71 = 12,560.43 : x
2. Step 2: Convert to fraction form
   23,170.78/31,975.71 = 12,560.43/x
3. Step 3: Cross multiply
   23,170.78x = 31,975.71 × 12,560.43
4. Step 4: Simplify right side
   23,170.78x = 401,628,810.62
5. Step 5: Solve for x
   x = 401,628,810.62/23,170.78
6. Step 6: Final answer
   x = 17,333.42