Finding the Fourth Proportional to 2,311.38, 3,189.72 and 1,263.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.38 : 3,189.72 = 1,263.46 : x
2. Step 2: Convert to fraction form
   2,311.38/3,189.72 = 1,263.46/x
3. Step 3: Cross multiply
   2,311.38x = 3,189.72 × 1,263.46
4. Step 4: Simplify right side
   2,311.38x = 4,030,083.63
5. Step 5: Solve for x
   x = 4,030,083.63/2,311.38
6. Step 6: Final answer
   x = 1,743.58