Finding the Fourth Proportional to 23,013.57, 31,759.88 and 12,945.18

Step by Step Solution

1. Step 1: Write the proportion equation
   23,013.57 : 31,759.88 = 12,945.18 : x
2. Step 2: Convert to fraction form
   23,013.57/31,759.88 = 12,945.18/x
3. Step 3: Cross multiply
   23,013.57x = 31,759.88 × 12,945.18
4. Step 4: Simplify right side
   23,013.57x = 411,137,298.65
5. Step 5: Solve for x
   x = 411,137,298.65/23,013.57
6. Step 6: Final answer
   x = 17,864.99