Finding the Fourth Proportional to 23,145.16, 31,940.42 and 13,073.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,145.16 : 31,940.42 = 13,073.72 : x
2. Step 2: Convert to fraction form
   23,145.16/31,940.42 = 13,073.72/x
3. Step 3: Cross multiply
   23,145.16x = 31,940.42 × 13,073.72
4. Step 4: Simplify right side
   23,145.16x = 417,580,107.76
5. Step 5: Solve for x
   x = 417,580,107.76/23,145.16
6. Step 6: Final answer
   x = 18,041.79