Finding the Fourth Proportional to 23,150.62, 31,947.84 and 12,540.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,150.62 : 31,947.84 = 12,540.30 : x
2. Step 2: Convert to fraction form
   23,150.62/31,947.84 = 12,540.30/x
3. Step 3: Cross multiply
   23,150.62x = 31,947.84 × 12,540.30
4. Step 4: Simplify right side
   23,150.62x = 400,635,497.95
5. Step 5: Solve for x
   x = 400,635,497.95/23,150.62
6. Step 6: Final answer
   x = 17,305.61