Finding the Fourth Proportional to 1,974.45, 2,725.20 and 1,311.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,974.45 : 2,725.20 = 1,311.33 : x
2. Step 2: Convert to fraction form
   1,974.45/2,725.20 = 1,311.33/x
3. Step 3: Cross multiply
   1,974.45x = 2,725.20 × 1,311.33
4. Step 4: Simplify right side
   1,974.45x = 3,573,636.52
5. Step 5: Solve for x
   x = 3,573,636.52/1,974.45
6. Step 6: Final answer
   x = 1,809.94