Finding the Fourth Proportional to 21,003.23, 28,984.97 and 12,933.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,003.23 : 28,984.97 = 12,933.83 : x
2. Step 2: Convert to fraction form
   21,003.23/28,984.97 = 12,933.83/x
3. Step 3: Cross multiply
   21,003.23x = 28,984.97 × 12,933.83
4. Step 4: Simplify right side
   21,003.23x = 374,886,561.94
5. Step 5: Solve for x
   x = 374,886,561.94/21,003.23
6. Step 6: Final answer
   x = 17,849.00