Finding the Fourth Proportional to 2,007.55, 3,012.87 and 897.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.55 : 3,012.87 = 897.31 : x
2. Step 2: Convert to fraction form
   2,007.55/3,012.87 = 897.31/x
3. Step 3: Cross multiply
   2,007.55x = 3,012.87 × 897.31
4. Step 4: Simplify right side
   2,007.55x = 2,703,478.38
5. Step 5: Solve for x
   x = 2,703,478.38/2,007.55
6. Step 6: Final answer
   x = 1,346.66