Finding the Fourth Proportional to 22,845.78, 31,521.42 and 13,412.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,845.78 : 31,521.42 = 13,412.52 : x
2. Step 2: Convert to fraction form
   22,845.78/31,521.42 = 13,412.52/x
3. Step 3: Cross multiply
   22,845.78x = 31,521.42 × 13,412.52
4. Step 4: Simplify right side
   22,845.78x = 422,781,676.18
5. Step 5: Solve for x
   x = 422,781,676.18/22,845.78
6. Step 6: Final answer
   x = 18,505.90