Finding the Fourth Proportional to 3,914.45, 5,397.09 and 2,586.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.45 : 5,397.09 = 2,586.05 : x
2. Step 2: Convert to fraction form
   3,914.45/5,397.09 = 2,586.05/x
3. Step 3: Cross multiply
   3,914.45x = 5,397.09 × 2,586.05
4. Step 4: Simplify right side
   3,914.45x = 13,957,144.59
5. Step 5: Solve for x
   x = 13,957,144.59/3,914.45
6. Step 6: Final answer
   x = 3,565.54