Finding the Fourth Proportional to 23,145.47, 31,940.66 and 12,535.10

Step by Step Solution

1. Step 1: Write the proportion equation
   23,145.47 : 31,940.66 = 12,535.10 : x
2. Step 2: Convert to fraction form
   23,145.47/31,940.66 = 12,535.10/x
3. Step 3: Cross multiply
   23,145.47x = 31,940.66 × 12,535.10
4. Step 4: Simplify right side
   23,145.47x = 400,379,238.80
5. Step 5: Solve for x
   x = 400,379,238.80/23,145.47
6. Step 6: Final answer
   x = 17,298.39