Finding the Fourth Proportional to 1,560.33, 2,153.55 and 897.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.33 : 2,153.55 = 897.15 : x
2. Step 2: Convert to fraction form
   1,560.33/2,153.55 = 897.15/x
3. Step 3: Cross multiply
   1,560.33x = 2,153.55 × 897.15
4. Step 4: Simplify right side
   1,560.33x = 1,932,057.38
5. Step 5: Solve for x
   x = 1,932,057.38/1,560.33
6. Step 6: Final answer
   x = 1,238.24