Finding the Fourth Proportional to 21,756.64, 30,019.74 and 12,323.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,756.64 : 30,019.74 = 12,323.38 : x
2. Step 2: Convert to fraction form
   21,756.64/30,019.74 = 12,323.38/x
3. Step 3: Cross multiply
   21,756.64x = 30,019.74 × 12,323.38
4. Step 4: Simplify right side
   21,756.64x = 369,944,663.52
5. Step 5: Solve for x
   x = 369,944,663.52/21,756.64
6. Step 6: Final answer
   x = 17,003.76