Finding the Fourth Proportional to 23,012.10, 31,756.53 and 12,940.56

Step by Step Solution

1. Step 1: Write the proportion equation
   23,012.10 : 31,756.53 = 12,940.56 : x
2. Step 2: Convert to fraction form
   23,012.10/31,756.53 = 12,940.56/x
3. Step 3: Cross multiply
   23,012.10x = 31,756.53 × 12,940.56
4. Step 4: Simplify right side
   23,012.10x = 410,947,123.07
5. Step 5: Solve for x
   x = 410,947,123.07/23,012.10
6. Step 6: Final answer
   x = 17,857.88