Finding the Fourth Proportional to 14,401.42, 19,863.23 and 12,788.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,401.42 : 19,863.23 = 12,788.28 : x
2. Step 2: Convert to fraction form
   14,401.42/19,863.23 = 12,788.28/x
3. Step 3: Cross multiply
   14,401.42x = 19,863.23 × 12,788.28
4. Step 4: Simplify right side
   14,401.42x = 254,016,546.94
5. Step 5: Solve for x
   x = 254,016,546.94/14,401.42
6. Step 6: Final answer
   x = 17,638.30