Finding the Fourth Proportional to 28,519.30, 42,786.24 and 10,984.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,519.30 : 42,786.24 = 10,984.42 : x
2. Step 2: Convert to fraction form
   28,519.30/42,786.24 = 10,984.42/x
3. Step 3: Cross multiply
   28,519.30x = 42,786.24 × 10,984.42
4. Step 4: Simplify right side
   28,519.30x = 469,982,030.38
5. Step 5: Solve for x
   x = 469,982,030.38/28,519.30
6. Step 6: Final answer
   x = 16,479.44