Finding the Fourth Proportional to 1,340.52, 1,851.42 and 897.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.52 : 1,851.42 = 897.66 : x
2. Step 2: Convert to fraction form
   1,340.52/1,851.42 = 897.66/x
3. Step 3: Cross multiply
   1,340.52x = 1,851.42 × 897.66
4. Step 4: Simplify right side
   1,340.52x = 1,661,945.68
5. Step 5: Solve for x
   x = 1,661,945.68/1,340.52
6. Step 6: Final answer
   x = 1,239.78