Finding the Fourth Proportional to 5,419.57, 8,122.71 and 3,081.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,419.57 : 8,122.71 = 3,081.53 : x
2. Step 2: Convert to fraction form
   5,419.57/8,122.71 = 3,081.53/x
3. Step 3: Cross multiply
   5,419.57x = 8,122.71 × 3,081.53
4. Step 4: Simplify right side
   5,419.57x = 25,030,374.55
5. Step 5: Solve for x
   x = 25,030,374.55/5,419.57
6. Step 6: Final answer
   x = 4,618.52