Finding the Fourth Proportional to 2,978.43, 4,477.77 and 2,434.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.43 : 4,477.77 = 2,434.56 : x
2. Step 2: Convert to fraction form
   2,978.43/4,477.77 = 2,434.56/x
3. Step 3: Cross multiply
   2,978.43x = 4,477.77 × 2,434.56
4. Step 4: Simplify right side
   2,978.43x = 10,901,399.73
5. Step 5: Solve for x
   x = 10,901,399.73/2,978.43
6. Step 6: Final answer
   x = 3,660.12