Finding the Fourth Proportional to 8,215.72, 12,322.54 and 2,293.06

Step by Step Solution

1. Step 1: Write the proportion equation
   8,215.72 : 12,322.54 = 2,293.06 : x
2. Step 2: Convert to fraction form
   8,215.72/12,322.54 = 2,293.06/x
3. Step 3: Cross multiply
   8,215.72x = 12,322.54 × 2,293.06
4. Step 4: Simplify right side
   8,215.72x = 28,256,323.57
5. Step 5: Solve for x
   x = 28,256,323.57/8,215.72
6. Step 6: Final answer
   x = 3,439.30