Finding the Fourth Proportional to 20,073.42, 27,701.39 and 12,515.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,073.42 : 27,701.39 = 12,515.31 : x
2. Step 2: Convert to fraction form
   20,073.42/27,701.39 = 12,515.31/x
3. Step 3: Cross multiply
   20,073.42x = 27,701.39 × 12,515.31
4. Step 4: Simplify right side
   20,073.42x = 346,691,514.57
5. Step 5: Solve for x
   x = 346,691,514.57/20,073.42
6. Step 6: Final answer
   x = 17,271.17