Finding the Fourth Proportional to 5,419.89, 8,129.25 and 3,676.09

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.89 : 8,129.25 = 3,676.09 : x
2. Step 2: Convert to fraction form
   5,419.89/8,129.25 = 3,676.09/x
3. Step 3: Cross multiply
   5,419.89x = 8,129.25 × 3,676.09
4. Step 4: Simplify right side
   5,419.89x = 29,883,834.31
5. Step 5: Solve for x
   x = 29,883,834.31/5,419.89
6. Step 6: Final answer
   x = 5,513.73