Finding the Fourth Proportional to 3,379.95, 4,667.90 and 2,586.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,379.95 : 4,667.90 = 2,586.15 : x
2. Step 2: Convert to fraction form
   3,379.95/4,667.90 = 2,586.15/x
3. Step 3: Cross multiply
   3,379.95x = 4,667.90 × 2,586.15
4. Step 4: Simplify right side
   3,379.95x = 12,071,876.65
5. Step 5: Solve for x
   x = 12,071,876.65/3,379.95
6. Step 6: Final answer
   x = 3,571.61