Finding the Fourth Proportional to 5,121.34, 7,676.54 and 3,656.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,121.34 : 7,676.54 = 3,656.05 : x
2. Step 2: Convert to fraction form
   5,121.34/7,676.54 = 3,656.05/x
3. Step 3: Cross multiply
   5,121.34x = 7,676.54 × 3,656.05
4. Step 4: Simplify right side
   5,121.34x = 28,065,833.49
5. Step 5: Solve for x
   x = 28,065,833.49/5,121.34
6. Step 6: Final answer
   x = 5,480.17