Finding the Fourth Proportional to 8,258.31, 12,390.03 and 2,636.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,258.31 : 12,390.03 = 2,636.82 : x
2. Step 2: Convert to fraction form
   8,258.31/12,390.03 = 2,636.82/x
3. Step 3: Cross multiply
   8,258.31x = 12,390.03 × 2,636.82
4. Step 4: Simplify right side
   8,258.31x = 32,670,278.90
5. Step 5: Solve for x
   x = 32,670,278.90/8,258.31
6. Step 6: Final answer
   x = 3,956.05