Finding the Fourth Proportional to 5,281.39, 7,287.17 and 3,156.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,281.39 : 7,287.17 = 3,156.60 : x
2. Step 2: Convert to fraction form
   5,281.39/7,287.17 = 3,156.60/x
3. Step 3: Cross multiply
   5,281.39x = 7,287.17 × 3,156.60
4. Step 4: Simplify right side
   5,281.39x = 23,002,692.37
5. Step 5: Solve for x
   x = 23,002,692.37/5,281.39
6. Step 6: Final answer
   x = 4,355.42