Finding the Fourth Proportional to 20,300.29, 28,018.92 and 12,340.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,300.29 : 28,018.92 = 12,340.83 : x
2. Step 2: Convert to fraction form
   20,300.29/28,018.92 = 12,340.83/x
3. Step 3: Cross multiply
   20,300.29x = 28,018.92 × 12,340.83
4. Step 4: Simplify right side
   20,300.29x = 345,776,728.50
5. Step 5: Solve for x
   x = 345,776,728.50/20,300.29
6. Step 6: Final answer
   x = 17,033.09