Finding the Fourth Proportional to 22,826.52, 31,499.28 and 13,398.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,826.52 : 31,499.28 = 13,398.12 : x
2. Step 2: Convert to fraction form
   22,826.52/31,499.28 = 13,398.12/x
3. Step 3: Cross multiply
   22,826.52x = 31,499.28 × 13,398.12
4. Step 4: Simplify right side
   22,826.52x = 422,031,133.35
5. Step 5: Solve for x
   x = 422,031,133.35/22,826.52
6. Step 6: Final answer
   x = 18,488.63