Finding the Fourth Proportional to 1,353.15, 2,031.56 and 867.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.15 : 2,031.56 = 867.15 : x
2. Step 2: Convert to fraction form
   1,353.15/2,031.56 = 867.15/x
3. Step 3: Cross multiply
   1,353.15x = 2,031.56 × 867.15
4. Step 4: Simplify right side
   1,353.15x = 1,761,662.92
5. Step 5: Solve for x
   x = 1,761,662.92/1,353.15
6. Step 6: Final answer
   x = 1,301.90