Finding the Fourth Proportional to 5,258.58, 7,870.69 and 3,871.35

Step by Step Solution

1. Step 1: Write the proportion equation
   5,258.58 : 7,870.69 = 3,871.35 : x
2. Step 2: Convert to fraction form
   5,258.58/7,870.69 = 3,871.35/x
3. Step 3: Cross multiply
   5,258.58x = 7,870.69 × 3,871.35
4. Step 4: Simplify right side
   5,258.58x = 30,470,195.73
5. Step 5: Solve for x
   x = 30,470,195.73/5,258.58
6. Step 6: Final answer
   x = 5,794.38