Finding the Fourth Proportional to 3,401.98, 5,105.03 and 1,210.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.98 : 5,105.03 = 1,210.55 : x
2. Step 2: Convert to fraction form
   3,401.98/5,105.03 = 1,210.55/x
3. Step 3: Cross multiply
   3,401.98x = 5,105.03 × 1,210.55
4. Step 4: Simplify right side
   3,401.98x = 6,179,862.49
5. Step 5: Solve for x
   x = 6,179,862.49/3,401.98
6. Step 6: Final answer
   x = 1,816.55