Finding the Fourth Proportional to 4,978.25, 6,862.61 and 3,185.53

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.25 : 6,862.61 = 3,185.53 : x
2. Step 2: Convert to fraction form
   4,978.25/6,862.61 = 3,185.53/x
3. Step 3: Cross multiply
   4,978.25x = 6,862.61 × 3,185.53
4. Step 4: Simplify right side
   4,978.25x = 21,861,040.84
5. Step 5: Solve for x
   x = 21,861,040.84/4,978.25
6. Step 6: Final answer
   x = 4,391.31