Finding the Fourth Proportional to 23,145.67, 31,940.96 and 12,535.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,145.67 : 31,940.96 = 12,535.28 : x
2. Step 2: Convert to fraction form
   23,145.67/31,940.96 = 12,535.28/x
3. Step 3: Cross multiply
   23,145.67x = 31,940.96 × 12,535.28
4. Step 4: Simplify right side
   23,145.67x = 400,388,654.69
5. Step 5: Solve for x
   x = 400,388,654.69/23,145.67
6. Step 6: Final answer
   x = 17,298.64