Finding the Fourth Proportional to 5,257.77, 7,870.25 and 3,872.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,257.77 : 7,870.25 = 3,872.67 : x
2. Step 2: Convert to fraction form
   5,257.77/7,870.25 = 3,872.67/x
3. Step 3: Cross multiply
   5,257.77x = 7,870.25 × 3,872.67
4. Step 4: Simplify right side
   5,257.77x = 30,478,822.35
5. Step 5: Solve for x
   x = 30,478,822.35/5,257.77
6. Step 6: Final answer
   x = 5,796.92