Finding the Fourth Proportional to 21,984.84, 30,338.42 and 12,551.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,984.84 : 30,338.42 = 12,551.56 : x
2. Step 2: Convert to fraction form
   21,984.84/30,338.42 = 12,551.56/x
3. Step 3: Cross multiply
   21,984.84x = 30,338.42 × 12,551.56
4. Step 4: Simplify right side
   21,984.84x = 380,794,498.94
5. Step 5: Solve for x
   x = 380,794,498.94/21,984.84
6. Step 6: Final answer
   x = 17,320.78