Finding the Fourth Proportional to 8,871.12, 12,241.69 and 5,513.86

Step by Step Solution

1. Step 1: Write the proportion equation
   8,871.12 : 12,241.69 = 5,513.86 : x
2. Step 2: Convert to fraction form
   8,871.12/12,241.69 = 5,513.86/x
3. Step 3: Cross multiply
   8,871.12x = 12,241.69 × 5,513.86
4. Step 4: Simplify right side
   8,871.12x = 67,498,964.82
5. Step 5: Solve for x
   x = 67,498,964.82/8,871.12
6. Step 6: Final answer
   x = 7,608.84