Finding the Fourth Proportional to 2,131.52, 3,193.02 and 1,311.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.52 : 3,193.02 = 1,311.39 : x
2. Step 2: Convert to fraction form
   2,131.52/3,193.02 = 1,311.39/x
3. Step 3: Cross multiply
   2,131.52x = 3,193.02 × 1,311.39
4. Step 4: Simplify right side
   2,131.52x = 4,187,294.50
5. Step 5: Solve for x
   x = 4,187,294.50/2,131.52
6. Step 6: Final answer
   x = 1,964.47