Finding the Fourth Proportional to 8,561.42, 12,839.58 and 3,630.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,561.42 : 12,839.58 = 3,630.98 : x
2. Step 2: Convert to fraction form
   8,561.42/12,839.58 = 3,630.98/x
3. Step 3: Cross multiply
   8,561.42x = 12,839.58 × 3,630.98
4. Step 4: Simplify right side
   8,561.42x = 46,620,258.19
5. Step 5: Solve for x
   x = 46,620,258.19/8,561.42
6. Step 6: Final answer
   x = 5,445.39