Finding the Fourth Proportional to 2,830.78, 3,904.77 and 2,457.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,830.78 : 3,904.77 = 2,457.10 : x
2. Step 2: Convert to fraction form
   2,830.78/3,904.77 = 2,457.10/x
3. Step 3: Cross multiply
   2,830.78x = 3,904.77 × 2,457.10
4. Step 4: Simplify right side
   2,830.78x = 9,594,410.37
5. Step 5: Solve for x
   x = 9,594,410.37/2,830.78
6. Step 6: Final answer
   x = 3,389.32