Finding the Fourth Proportional to 2,979.78, 4,469.79 and 1,005.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.78 : 4,469.79 = 1,005.60 : x
2. Step 2: Convert to fraction form
   2,979.78/4,469.79 = 1,005.60/x
3. Step 3: Cross multiply
   2,979.78x = 4,469.79 × 1,005.60
4. Step 4: Simplify right side
   2,979.78x = 4,494,820.82
5. Step 5: Solve for x
   x = 4,494,820.82/2,979.78
6. Step 6: Final answer
   x = 1,508.44