Finding the Fourth Proportional to 23,150.54, 31,947.79 and 12,540.18

Step by Step Solution

1. Step 1: Write the proportion equation
   23,150.54 : 31,947.79 = 12,540.18 : x
2. Step 2: Convert to fraction form
   23,150.54/31,947.79 = 12,540.18/x
3. Step 3: Cross multiply
   23,150.54x = 31,947.79 × 12,540.18
4. Step 4: Simplify right side
   23,150.54x = 400,631,037.20
5. Step 5: Solve for x
   x = 400,631,037.20/23,150.54
6. Step 6: Final answer
   x = 17,305.47