Finding the Fourth Proportional to 20,830.06, 28,734.72 and 14,113.39

Step by Step Solution

1. Step 1: Write the proportion equation
   20,830.06 : 28,734.72 = 14,113.39 : x
2. Step 2: Convert to fraction form
   20,830.06/28,734.72 = 14,113.39/x
3. Step 3: Cross multiply
   20,830.06x = 28,734.72 × 14,113.39
4. Step 4: Simplify right side
   20,830.06x = 405,544,309.90
5. Step 5: Solve for x
   x = 405,544,309.90/20,830.06
6. Step 6: Final answer
   x = 19,469.19