Finding the Fourth Proportional to 4,940.72, 7,411.52 and 1,478

Step by Step Solution

1. Step 1: Write the proportion equation
   4,940.72 : 7,411.52 = 1,478 : x
2. Step 2: Convert to fraction form
   4,940.72/7,411.52 = 1,478/x
3. Step 3: Cross multiply
   4,940.72x = 7,411.52 × 1,478
4. Step 4: Simplify right side
   4,940.72x = 10,954,226.56
5. Step 5: Solve for x
   x = 10,954,226.56/4,940.72
6. Step 6: Final answer
   x = 2,217.13