Finding the Fourth Proportional to 12,073.50, 18,111.94 and 11,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,073.50 : 18,111.94 = 11,409.50 : x
2. Step 2: Convert to fraction form
   12,073.50/18,111.94 = 11,409.50/x
3. Step 3: Cross multiply
   12,073.50x = 18,111.94 × 11,409.50
4. Step 4: Simplify right side
   12,073.50x = 206,648,179.43
5. Step 5: Solve for x
   x = 206,648,179.43/12,073.50
6. Step 6: Final answer
   x = 17,115.85