Finding the Fourth Proportional to 2,291.30, 3,162 and 1,243.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.30 : 3,162 = 1,243.37 : x
2. Step 2: Convert to fraction form
   2,291.30/3,162 = 1,243.37/x
3. Step 3: Cross multiply
   2,291.30x = 3,162 × 1,243.37
4. Step 4: Simplify right side
   2,291.30x = 3,931,520.13
5. Step 5: Solve for x
   x = 3,931,520.13/2,291.30
6. Step 6: Final answer
   x = 1,715.85