Finding the Fourth Proportional to 8,455.93, 12,683.59 and 2,215.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,455.93 : 12,683.59 = 2,215.89 : x
2. Step 2: Convert to fraction form
   8,455.93/12,683.59 = 2,215.89/x
3. Step 3: Cross multiply
   8,455.93x = 12,683.59 × 2,215.89
4. Step 4: Simplify right side
   8,455.93x = 28,105,447.17
5. Step 5: Solve for x
   x = 28,105,447.17/8,455.93
6. Step 6: Final answer
   x = 3,323.76