Finding the Fourth Proportional to 20,073.63, 27,689.72 and 12,111.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,073.63 : 27,689.72 = 12,111.15 : x
2. Step 2: Convert to fraction form
   20,073.63/27,689.72 = 12,111.15/x
3. Step 3: Cross multiply
   20,073.63x = 27,689.72 × 12,111.15
4. Step 4: Simplify right side
   20,073.63x = 335,354,291.82
5. Step 5: Solve for x
   x = 335,354,291.82/20,073.63
6. Step 6: Final answer
   x = 16,706.21