Finding the Fourth Proportional to 3,810.18, 5,715.39 and 1,311.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.18 : 5,715.39 = 1,311.34 : x
2. Step 2: Convert to fraction form
   3,810.18/5,715.39 = 1,311.34/x
3. Step 3: Cross multiply
   3,810.18x = 5,715.39 × 1,311.34
4. Step 4: Simplify right side
   3,810.18x = 7,494,819.52
5. Step 5: Solve for x
   x = 7,494,819.52/3,810.18
6. Step 6: Final answer
   x = 1,967.05