Finding the Fourth Proportional to 6,212.18, 8,572.69 and 3,379.61

Step by Step Solution

1. Step 1: Write the proportion equation
   6,212.18 : 8,572.69 = 3,379.61 : x
2. Step 2: Convert to fraction form
   6,212.18/8,572.69 = 3,379.61/x
3. Step 3: Cross multiply
   6,212.18x = 8,572.69 × 3,379.61
4. Step 4: Simplify right side
   6,212.18x = 28,972,361.83
5. Step 5: Solve for x
   x = 28,972,361.83/6,212.18
6. Step 6: Final answer
   x = 4,663.80