Finding the Fourth Proportional to 22,840.96, 31,515.60 and 13,407.04

Step by Step Solution

1. Step 1: Write the proportion equation
   22,840.96 : 31,515.60 = 13,407.04 : x
2. Step 2: Convert to fraction form
   22,840.96/31,515.60 = 13,407.04/x
3. Step 3: Cross multiply
   22,840.96x = 31,515.60 × 13,407.04
4. Step 4: Simplify right side
   22,840.96x = 422,530,909.82
5. Step 5: Solve for x
   x = 422,530,909.82/22,840.96
6. Step 6: Final answer
   x = 18,498.82