Finding the Fourth Proportional to 1,311.46, 1,801.72 and 1,173.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311.46 : 1,801.72 = 1,173.41 : x
2. Step 2: Convert to fraction form
   1,311.46/1,801.72 = 1,173.41/x
3. Step 3: Cross multiply
   1,311.46x = 1,801.72 × 1,173.41
4. Step 4: Simplify right side
   1,311.46x = 2,114,141.39
5. Step 5: Solve for x
   x = 2,114,141.39/1,311.46
6. Step 6: Final answer
   x = 1,612.05