Finding the Fourth Proportional to 8,143.64, 12,215.82 and 3,458.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,143.64 : 12,215.82 = 3,458.96 : x
2. Step 2: Convert to fraction form
   8,143.64/12,215.82 = 3,458.96/x
3. Step 3: Cross multiply
   8,143.64x = 12,215.82 × 3,458.96
4. Step 4: Simplify right side
   8,143.64x = 42,254,032.75
5. Step 5: Solve for x
   x = 42,254,032.75/8,143.64
6. Step 6: Final answer
   x = 5,188.59