Finding the Fourth Proportional to 23,021.56, 31,760.75 and 12,947.69

Step by Step Solution

1. Step 1: Write the proportion equation
   23,021.56 : 31,760.75 = 12,947.69 : x
2. Step 2: Convert to fraction form
   23,021.56/31,760.75 = 12,947.69/x
3. Step 3: Cross multiply
   23,021.56x = 31,760.75 × 12,947.69
4. Step 4: Simplify right side
   23,021.56x = 411,228,456.94
5. Step 5: Solve for x
   x = 411,228,456.94/23,021.56
6. Step 6: Final answer
   x = 17,862.76