Finding the Fourth Proportional to 21,984.07, 30,338.58 and 12,553.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,984.07 : 30,338.58 = 12,553.51 : x
2. Step 2: Convert to fraction form
   21,984.07/30,338.58 = 12,553.51/x
3. Step 3: Cross multiply
   21,984.07x = 30,338.58 × 12,553.51
4. Step 4: Simplify right side
   21,984.07x = 380,855,667.42
5. Step 5: Solve for x
   x = 380,855,667.42/21,984.07
6. Step 6: Final answer
   x = 17,324.17