Finding the Fourth Proportional to 8,957.98, 13,439.67 and 3,618.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,957.98 : 13,439.67 = 3,618.42 : x
2. Step 2: Convert to fraction form
   8,957.98/13,439.67 = 3,618.42/x
3. Step 3: Cross multiply
   8,957.98x = 13,439.67 × 3,618.42
4. Step 4: Simplify right side
   8,957.98x = 48,630,370.72
5. Step 5: Solve for x
   x = 48,630,370.72/8,957.98
6. Step 6: Final answer
   x = 5,428.72