Finding the Fourth Proportional to 2,076.85, 3,115.27 and 1,210.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.85 : 3,115.27 = 1,210.55 : x
2. Step 2: Convert to fraction form
   2,076.85/3,115.27 = 1,210.55/x
3. Step 3: Cross multiply
   2,076.85x = 3,115.27 × 1,210.55
4. Step 4: Simplify right side
   2,076.85x = 3,771,190.10
5. Step 5: Solve for x
   x = 3,771,190.10/2,076.85
6. Step 6: Final answer
   x = 1,815.82