Finding the Fourth Proportional to 2,480.10, 3,719.94 and 836.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,480.10 : 3,719.94 = 836.21 : x
2. Step 2: Convert to fraction form
   2,480.10/3,719.94 = 836.21/x
3. Step 3: Cross multiply
   2,480.10x = 3,719.94 × 836.21
4. Step 4: Simplify right side
   2,480.10x = 3,110,632.43
5. Step 5: Solve for x
   x = 3,110,632.43/2,480.10
6. Step 6: Final answer
   x = 1,254.24