Finding the Fourth Proportional to 20,944.99, 28,909.53 and 13,868.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,944.99 : 28,909.53 = 13,868.83 : x
2. Step 2: Convert to fraction form
   20,944.99/28,909.53 = 13,868.83/x
3. Step 3: Cross multiply
   20,944.99x = 28,909.53 × 13,868.83
4. Step 4: Simplify right side
   20,944.99x = 400,941,143.06
5. Step 5: Solve for x
   x = 400,941,143.06/20,944.99
6. Step 6: Final answer
   x = 19,142.58