Finding the Fourth Proportional to 13,769.60, 18,993.56 and 12,005.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,769.60 : 18,993.56 = 12,005.42 : x
2. Step 2: Convert to fraction form
   13,769.60/18,993.56 = 12,005.42/x
3. Step 3: Cross multiply
   13,769.60x = 18,993.56 × 12,005.42
4. Step 4: Simplify right side
   13,769.60x = 228,025,665.10
5. Step 5: Solve for x
   x = 228,025,665.10/13,769.60
6. Step 6: Final answer
   x = 16,560.08