Finding the Fourth Proportional to 22,799.37, 31,460.31 and 12,728.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,799.37 : 31,460.31 = 12,728.37 : x
2. Step 2: Convert to fraction form
   22,799.37/31,460.31 = 12,728.37/x
3. Step 3: Cross multiply
   22,799.37x = 31,460.31 × 12,728.37
4. Step 4: Simplify right side
   22,799.37x = 400,438,465.99
5. Step 5: Solve for x
   x = 400,438,465.99/22,799.37
6. Step 6: Final answer
   x = 17,563.58