Finding the Fourth Proportional to 2,795.15, 4,189.15 and 1,311.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,795.15 : 4,189.15 = 1,311.10 : x
2. Step 2: Convert to fraction form
   2,795.15/4,189.15 = 1,311.10/x
3. Step 3: Cross multiply
   2,795.15x = 4,189.15 × 1,311.10
4. Step 4: Simplify right side
   2,795.15x = 5,492,373.62
5. Step 5: Solve for x
   x = 5,492,373.62/2,795.15
6. Step 6: Final answer
   x = 1,964.97