Finding the Fourth Proportional to 7,148.78, 10,726.83 and 3,404.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,148.78 : 10,726.83 = 3,404.79 : x
2. Step 2: Convert to fraction form
   7,148.78/10,726.83 = 3,404.79/x
3. Step 3: Cross multiply
   7,148.78x = 10,726.83 × 3,404.79
4. Step 4: Simplify right side
   7,148.78x = 36,522,603.52
5. Step 5: Solve for x
   x = 36,522,603.52/7,148.78
6. Step 6: Final answer
   x = 5,108.93