Finding the Fourth Proportional to 23,150.58, 31,947.95 and 12,540.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,150.58 : 31,947.95 = 12,540.21 : x
2. Step 2: Convert to fraction form
   23,150.58/31,947.95 = 12,540.21/x
3. Step 3: Cross multiply
   23,150.58x = 31,947.95 × 12,540.21
4. Step 4: Simplify right side
   23,150.58x = 400,634,093.32
5. Step 5: Solve for x
   x = 400,634,093.32/23,150.58
6. Step 6: Final answer
   x = 17,305.58