Finding the Fourth Proportional to 4,089.72, 6,139.80 and 3,404.76

Step by Step Solution

1. Step 1: Write the proportion equation
   4,089.72 : 6,139.80 = 3,404.76 : x
2. Step 2: Convert to fraction form
   4,089.72/6,139.80 = 3,404.76/x
3. Step 3: Cross multiply
   4,089.72x = 6,139.80 × 3,404.76
4. Step 4: Simplify right side
   4,089.72x = 20,904,545.45
5. Step 5: Solve for x
   x = 20,904,545.45/4,089.72
6. Step 6: Final answer
   x = 5,111.49