Finding the Fourth Proportional to 3,918.50, 5,395.55 and 3,605.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.50 : 5,395.55 = 3,605.03 : x
2. Step 2: Convert to fraction form
   3,918.50/5,395.55 = 3,605.03/x
3. Step 3: Cross multiply
   3,918.50x = 5,395.55 × 3,605.03
4. Step 4: Simplify right side
   3,918.50x = 19,451,074.61
5. Step 5: Solve for x
   x = 19,451,074.61/3,918.50
6. Step 6: Final answer
   x = 4,963.91