Finding the Fourth Proportional to 23,149.67, 31,946.59 and 12,539.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,149.67 : 31,946.59 = 12,539.31 : x
2. Step 2: Convert to fraction form
   23,149.67/31,946.59 = 12,539.31/x
3. Step 3: Cross multiply
   23,149.67x = 31,946.59 × 12,539.31
4. Step 4: Simplify right side
   23,149.67x = 400,588,195.45
5. Step 5: Solve for x
   x = 400,588,195.45/23,149.67
6. Step 6: Final answer
   x = 17,304.27