Finding the Fourth Proportional to 12,123.89, 18,187.09 and 3,358.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.89 : 18,187.09 = 3,358.80 : x
2. Step 2: Convert to fraction form
   12,123.89/18,187.09 = 3,358.80/x
3. Step 3: Cross multiply
   12,123.89x = 18,187.09 × 3,358.80
4. Step 4: Simplify right side
   12,123.89x = 61,086,789.50
5. Step 5: Solve for x
   x = 61,086,789.50/12,123.89
6. Step 6: Final answer
   x = 5,038.55