Finding the Fourth Proportional to 23,171.53, 31,977.46 and 12,823.39

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.53 : 31,977.46 = 12,823.39 : x
2. Step 2: Convert to fraction form
   23,171.53/31,977.46 = 12,823.39/x
3. Step 3: Cross multiply
   23,171.53x = 31,977.46 × 12,823.39
4. Step 4: Simplify right side
   23,171.53x = 410,059,370.79
5. Step 5: Solve for x
   x = 410,059,370.79/23,171.53
6. Step 6: Final answer
   x = 17,696.69