Finding the Fourth Proportional to 2,876.39, 4,311.68 and 1,120.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,876.39 : 4,311.68 = 1,120.30 : x
2. Step 2: Convert to fraction form
   2,876.39/4,311.68 = 1,120.30/x
3. Step 3: Cross multiply
   2,876.39x = 4,311.68 × 1,120.30
4. Step 4: Simplify right side
   2,876.39x = 4,830,358.72
5. Step 5: Solve for x
   x = 4,830,358.72/2,876.39
6. Step 6: Final answer
   x = 1,679.31