Finding the Fourth Proportional to 2,291.32, 3,162.04 and 1,243.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.32 : 3,162.04 = 1,243.40 : x
2. Step 2: Convert to fraction form
   2,291.32/3,162.04 = 1,243.40/x
3. Step 3: Cross multiply
   2,291.32x = 3,162.04 × 1,243.40
4. Step 4: Simplify right side
   2,291.32x = 3,931,680.54
5. Step 5: Solve for x
   x = 3,931,680.54/2,291.32
6. Step 6: Final answer
   x = 1,715.90