Finding the Fourth Proportional to 1,559.23, 2,151.57 and 896.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.23 : 2,151.57 = 896.30 : x
2. Step 2: Convert to fraction form
   1,559.23/2,151.57 = 896.30/x
3. Step 3: Cross multiply
   1,559.23x = 2,151.57 × 896.30
4. Step 4: Simplify right side
   1,559.23x = 1,928,436.95
5. Step 5: Solve for x
   x = 1,928,436.95/1,559.23
6. Step 6: Final answer
   x = 1,236.79