Finding the Fourth Proportional to 3,726.86, 5,138.78 and 3,401.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,726.86 : 5,138.78 = 3,401.42 : x
2. Step 2: Convert to fraction form
   3,726.86/5,138.78 = 3,401.42/x
3. Step 3: Cross multiply
   3,726.86x = 5,138.78 × 3,401.42
4. Step 4: Simplify right side
   3,726.86x = 17,479,149.07
5. Step 5: Solve for x
   x = 17,479,149.07/3,726.86
6. Step 6: Final answer
   x = 4,690.05