Finding the Fourth Proportional to 20,493, 28,281.96 and 12,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,493 : 28,281.96 = 12,111.12 : x
2. Step 2: Convert to fraction form
   20,493/28,281.96 = 12,111.12/x
3. Step 3: Cross multiply
   20,493x = 28,281.96 × 12,111.12
4. Step 4: Simplify right side
   20,493x = 342,526,211.40
5. Step 5: Solve for x
   x = 342,526,211.40/20,493
6. Step 6: Final answer
   x = 16,714.30