Finding the Fourth Proportional to 23,085.45, 31,857.81 and 12,475.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,085.45 : 31,857.81 = 12,475.05 : x
2. Step 2: Convert to fraction form
   23,085.45/31,857.81 = 12,475.05/x
3. Step 3: Cross multiply
   23,085.45x = 31,857.81 × 12,475.05
4. Step 4: Simplify right side
   23,085.45x = 397,427,772.64
5. Step 5: Solve for x
   x = 397,427,772.64/23,085.45
6. Step 6: Final answer
   x = 17,215.51