Finding the Fourth Proportional to 2,679.16, 4,019.36 and 830.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.16 : 4,019.36 = 830.18 : x
2. Step 2: Convert to fraction form
   2,679.16/4,019.36 = 830.18/x
3. Step 3: Cross multiply
   2,679.16x = 4,019.36 × 830.18
4. Step 4: Simplify right side
   2,679.16x = 3,336,784.31
5. Step 5: Solve for x
   x = 3,336,784.31/2,679.16
6. Step 6: Final answer
   x = 1,245.46