Finding the Fourth Proportional to 1,338.45, 1,845.39 and 865.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.45 : 1,845.39 = 865.54 : x
2. Step 2: Convert to fraction form
   1,338.45/1,845.39 = 865.54/x
3. Step 3: Cross multiply
   1,338.45x = 1,845.39 × 865.54
4. Step 4: Simplify right side
   1,338.45x = 1,597,258.86
5. Step 5: Solve for x
   x = 1,597,258.86/1,338.45
6. Step 6: Final answer
   x = 1,193.36