Finding the Fourth Proportional to 7,611.50, 11,418.89 and 3,228.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,611.50 : 11,418.89 = 3,228.86 : x
2. Step 2: Convert to fraction form
   7,611.50/11,418.89 = 3,228.86/x
3. Step 3: Cross multiply
   7,611.50x = 11,418.89 × 3,228.86
4. Step 4: Simplify right side
   7,611.50x = 36,870,009.57
5. Step 5: Solve for x
   x = 36,870,009.57/7,611.50
6. Step 6: Final answer
   x = 4,843.99