Finding the Fourth Proportional to 23,140.72, 31,934.12 and 12,530.36

Step by Step Solution

1. Step 1: Write the proportion equation
   23,140.72 : 31,934.12 = 12,530.36 : x
2. Step 2: Convert to fraction form
   23,140.72/31,934.12 = 12,530.36/x
3. Step 3: Cross multiply
   23,140.72x = 31,934.12 × 12,530.36
4. Step 4: Simplify right side
   23,140.72x = 400,146,019.88
5. Step 5: Solve for x
   x = 400,146,019.88/23,140.72
6. Step 6: Final answer
   x = 17,291.86