Finding the Fourth Proportional to 2,928.72, 4,394.24 and 1,284.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,928.72 : 4,394.24 = 1,284.12 : x
2. Step 2: Convert to fraction form
   2,928.72/4,394.24 = 1,284.12/x
3. Step 3: Cross multiply
   2,928.72x = 4,394.24 × 1,284.12
4. Step 4: Simplify right side
   2,928.72x = 5,642,731.47
5. Step 5: Solve for x
   x = 5,642,731.47/2,928.72
6. Step 6: Final answer
   x = 1,926.69