Finding the Fourth Proportional to 1,338.36, 1,845.72 and 896.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.36 : 1,845.72 = 896.85 : x
2. Step 2: Convert to fraction form
   1,338.36/1,845.72 = 896.85/x
3. Step 3: Cross multiply
   1,338.36x = 1,845.72 × 896.85
4. Step 4: Simplify right side
   1,338.36x = 1,655,333.98
5. Step 5: Solve for x
   x = 1,655,333.98/1,338.36
6. Step 6: Final answer
   x = 1,236.84