Finding the Fourth Proportional to 1,326.10, 1,974.71 and 1,311.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,326.10 : 1,974.71 = 1,311.54 : x
2. Step 2: Convert to fraction form
   1,326.10/1,974.71 = 1,311.54/x
3. Step 3: Cross multiply
   1,326.10x = 1,974.71 × 1,311.54
4. Step 4: Simplify right side
   1,326.10x = 2,589,898.72
5. Step 5: Solve for x
   x = 2,589,898.72/1,326.10
6. Step 6: Final answer
   x = 1,953.02