Finding the Fourth Proportional to 23,145.87, 31,940.37 and 13,584.45

Step by Step Solution

1. Step 1: Write the proportion equation
   23,145.87 : 31,940.37 = 13,584.45 : x
2. Step 2: Convert to fraction form
   23,145.87/31,940.37 = 13,584.45/x
3. Step 3: Cross multiply
   23,145.87x = 31,940.37 × 13,584.45
4. Step 4: Simplify right side
   23,145.87x = 433,892,359.25
5. Step 5: Solve for x
   x = 433,892,359.25/23,145.87
6. Step 6: Final answer
   x = 18,745.99