Finding the Fourth Proportional to 8,112.72, 12,161.40 and 3,498.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.72 : 12,161.40 = 3,498.96 : x
2. Step 2: Convert to fraction form
   8,112.72/12,161.40 = 3,498.96/x
3. Step 3: Cross multiply
   8,112.72x = 12,161.40 × 3,498.96
4. Step 4: Simplify right side
   8,112.72x = 42,552,252.14
5. Step 5: Solve for x
   x = 42,552,252.14/8,112.72
6. Step 6: Final answer
   x = 5,245.13