Finding the Fourth Proportional to 5,118.83, 7,676.81 and 1,420.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,118.83 : 7,676.81 = 1,420.18 : x
2. Step 2: Convert to fraction form
   5,118.83/7,676.81 = 1,420.18/x
3. Step 3: Cross multiply
   5,118.83x = 7,676.81 × 1,420.18
4. Step 4: Simplify right side
   5,118.83x = 10,902,439.05
5. Step 5: Solve for x
   x = 10,902,439.05/5,118.83
6. Step 6: Final answer
   x = 2,129.87