Finding the Fourth Proportional to 1,399.38, 1,929.54 and 894.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.38 : 1,929.54 = 894.55 : x
2. Step 2: Convert to fraction form
   1,399.38/1,929.54 = 894.55/x
3. Step 3: Cross multiply
   1,399.38x = 1,929.54 × 894.55
4. Step 4: Simplify right side
   1,399.38x = 1,726,070.01
5. Step 5: Solve for x
   x = 1,726,070.01/1,399.38
6. Step 6: Final answer
   x = 1,233.45