Finding the Fourth Proportional to 2,811.39, 4,211.43 and 1,401.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.39 : 4,211.43 = 1,401.55 : x
2. Step 2: Convert to fraction form
   2,811.39/4,211.43 = 1,401.55/x
3. Step 3: Cross multiply
   2,811.39x = 4,211.43 × 1,401.55
4. Step 4: Simplify right side
   2,811.39x = 5,902,537.62
5. Step 5: Solve for x
   x = 5,902,537.62/2,811.39
6. Step 6: Final answer
   x = 2,099.51