Finding the Fourth Proportional to 2,940.46, 4,404.21 and 1,783.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.46 : 4,404.21 = 1,783.78 : x
2. Step 2: Convert to fraction form
   2,940.46/4,404.21 = 1,783.78/x
3. Step 3: Cross multiply
   2,940.46x = 4,404.21 × 1,783.78
4. Step 4: Simplify right side
   2,940.46x = 7,856,141.71
5. Step 5: Solve for x
   x = 7,856,141.71/2,940.46
6. Step 6: Final answer
   x = 2,671.74