Finding the Fourth Proportional to 20,103.82, 27,742.84 and 12,445.05

Step by Step Solution

1. Step 1: Write the proportion equation
   20,103.82 : 27,742.84 = 12,445.05 : x
2. Step 2: Convert to fraction form
   20,103.82/27,742.84 = 12,445.05/x
3. Step 3: Cross multiply
   20,103.82x = 27,742.84 × 12,445.05
4. Step 4: Simplify right side
   20,103.82x = 345,261,030.94
5. Step 5: Solve for x
   x = 345,261,030.94/20,103.82
6. Step 6: Final answer
   x = 17,173.90