Finding the Fourth Proportional to 2,311.42, 3,189.01 and 1,316.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.42 : 3,189.01 = 1,316.55 : x
2. Step 2: Convert to fraction form
   2,311.42/3,189.01 = 1,316.55/x
3. Step 3: Cross multiply
   2,311.42x = 3,189.01 × 1,316.55
4. Step 4: Simplify right side
   2,311.42x = 4,198,491.12
5. Step 5: Solve for x
   x = 4,198,491.12/2,311.42
6. Step 6: Final answer
   x = 1,816.41