Finding the Fourth Proportional to 1,288.69, 1,932.96 and 897.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288.69 : 1,932.96 = 897.55 : x
2. Step 2: Convert to fraction form
   1,288.69/1,932.96 = 897.55/x
3. Step 3: Cross multiply
   1,288.69x = 1,932.96 × 897.55
4. Step 4: Simplify right side
   1,288.69x = 1,734,928.25
5. Step 5: Solve for x
   x = 1,734,928.25/1,288.69
6. Step 6: Final answer
   x = 1,346.27