Finding the Fourth Proportional to 2,679.54, 4,019.70 and 830.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,679.54 : 4,019.70 = 830.82 : x
2. Step 2: Convert to fraction form
   2,679.54/4,019.70 = 830.82/x
3. Step 3: Cross multiply
   2,679.54x = 4,019.70 × 830.82
4. Step 4: Simplify right side
   2,679.54x = 3,339,647.15
5. Step 5: Solve for x
   x = 3,339,647.15/2,679.54
6. Step 6: Final answer
   x = 1,246.35