Finding the Fourth Proportional to 22,827.42, 31,498.47 and 13,399.02

Step by Step Solution

1. Step 1: Write the proportion equation
   22,827.42 : 31,498.47 = 13,399.02 : x
2. Step 2: Convert to fraction form
   22,827.42/31,498.47 = 13,399.02/x
3. Step 3: Cross multiply
   22,827.42x = 31,498.47 × 13,399.02
4. Step 4: Simplify right side
   22,827.42x = 422,048,629.50
5. Step 5: Solve for x
   x = 422,048,629.50/22,827.42
6. Step 6: Final answer
   x = 18,488.67