Finding the Fourth Proportional to 8,087.31, 12,105.88 and 4,380.35

Step by Step Solution

1. Step 1: Write the proportion equation
   8,087.31 : 12,105.88 = 4,380.35 : x
2. Step 2: Convert to fraction form
   8,087.31/12,105.88 = 4,380.35/x
3. Step 3: Cross multiply
   8,087.31x = 12,105.88 × 4,380.35
4. Step 4: Simplify right side
   8,087.31x = 53,027,919.98
5. Step 5: Solve for x
   x = 53,027,919.98/8,087.31
6. Step 6: Final answer
   x = 6,556.93