Finding the Fourth Proportional to 28,196.84, 42,278.84 and 10,668

Step by Step Solution

1. Step 1: Write the proportion equation
   28,196.84 : 42,278.84 = 10,668 : x
2. Step 2: Convert to fraction form
   28,196.84/42,278.84 = 10,668/x
3. Step 3: Cross multiply
   28,196.84x = 42,278.84 × 10,668
4. Step 4: Simplify right side
   28,196.84x = 451,030,665.12
5. Step 5: Solve for x
   x = 451,030,665.12/28,196.84
6. Step 6: Final answer
   x = 15,995.79