Finding the Fourth Proportional to 1,561.24, 2,340.24 and 867.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.24 : 2,340.24 = 867.72 : x
2. Step 2: Convert to fraction form
   1,561.24/2,340.24 = 867.72/x
3. Step 3: Cross multiply
   1,561.24x = 2,340.24 × 867.72
4. Step 4: Simplify right side
   1,561.24x = 2,030,673.05
5. Step 5: Solve for x
   x = 2,030,673.05/1,561.24
6. Step 6: Final answer
   x = 1,300.68