Finding the Fourth Proportional to 5,261.25, 7,896.84 and 3,870.35

Step by Step Solution

1. Step 1: Write the proportion equation
   5,261.25 : 7,896.84 = 3,870.35 : x
2. Step 2: Convert to fraction form
   5,261.25/7,896.84 = 3,870.35/x
3. Step 3: Cross multiply
   5,261.25x = 7,896.84 × 3,870.35
4. Step 4: Simplify right side
   5,261.25x = 30,563,534.69
5. Step 5: Solve for x
   x = 30,563,534.69/5,261.25
6. Step 6: Final answer
   x = 5,809.18