Finding the Fourth Proportional to 21,768.84, 30,039.72 and 12,337.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,768.84 : 30,039.72 = 12,337.20 : x
2. Step 2: Convert to fraction form
   21,768.84/30,039.72 = 12,337.20/x
3. Step 3: Cross multiply
   21,768.84x = 30,039.72 × 12,337.20
4. Step 4: Simplify right side
   21,768.84x = 370,606,033.58
5. Step 5: Solve for x
   x = 370,606,033.58/21,768.84
6. Step 6: Final answer
   x = 17,024.61