Finding the Fourth Proportional to 3,681.59, 5,078.40 and 3,435.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,681.59 : 5,078.40 = 3,435.55 : x
2. Step 2: Convert to fraction form
   3,681.59/5,078.40 = 3,435.55/x
3. Step 3: Cross multiply
   3,681.59x = 5,078.40 × 3,435.55
4. Step 4: Simplify right side
   3,681.59x = 17,447,071.54
5. Step 5: Solve for x
   x = 17,447,071.54/3,681.59
6. Step 6: Final answer
   x = 4,739.01