Finding the Fourth Proportional to 1,560.86, 2,153.98 and 897.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.86 : 2,153.98 = 897.83 : x
2. Step 2: Convert to fraction form
   1,560.86/2,153.98 = 897.83/x
3. Step 3: Cross multiply
   1,560.86x = 2,153.98 × 897.83
4. Step 4: Simplify right side
   1,560.86x = 1,933,907.86
5. Step 5: Solve for x
   x = 1,933,907.86/1,560.86
6. Step 6: Final answer
   x = 1,239.00