Finding the Fourth Proportional to 8,118.72, 12,170.40 and 3,504.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,118.72 : 12,170.40 = 3,504.96 : x
2. Step 2: Convert to fraction form
   8,118.72/12,170.40 = 3,504.96/x
3. Step 3: Cross multiply
   8,118.72x = 12,170.40 × 3,504.96
4. Step 4: Simplify right side
   8,118.72x = 42,656,765.18
5. Step 5: Solve for x
   x = 42,656,765.18/8,118.72
6. Step 6: Final answer
   x = 5,254.12