Finding the Fourth Proportional to 3,810.49, 5,681.50 and 3,485.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.49 : 5,681.50 = 3,485.05 : x
2. Step 2: Convert to fraction form
   3,810.49/5,681.50 = 3,485.05/x
3. Step 3: Cross multiply
   3,810.49x = 5,681.50 × 3,485.05
4. Step 4: Simplify right side
   3,810.49x = 19,800,265.74
5. Step 5: Solve for x
   x = 19,800,265.74/3,810.49
6. Step 6: Final answer
   x = 5,196.26