Finding the Fourth Proportional to 20,612.39, 28,443.47 and 12,114.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,612.39 : 28,443.47 = 12,114.82 : x
2. Step 2: Convert to fraction form
   20,612.39/28,443.47 = 12,114.82/x
3. Step 3: Cross multiply
   20,612.39x = 28,443.47 × 12,114.82
4. Step 4: Simplify right side
   20,612.39x = 344,587,494.21
5. Step 5: Solve for x
   x = 344,587,494.21/20,612.39
6. Step 6: Final answer
   x = 16,717.50