Finding the Fourth Proportional to 2,876.51, 4,311.86 and 1,120.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,876.51 : 4,311.86 = 1,120.42 : x
2. Step 2: Convert to fraction form
   2,876.51/4,311.86 = 1,120.42/x
3. Step 3: Cross multiply
   2,876.51x = 4,311.86 × 1,120.42
4. Step 4: Simplify right side
   2,876.51x = 4,831,072.62
5. Step 5: Solve for x
   x = 4,831,072.62/2,876.51
6. Step 6: Final answer
   x = 1,679.49