Finding the Fourth Proportional to 1,338.36, 1,848.72 and 1,047.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.36 : 1,848.72 = 1,047.28 : x
2. Step 2: Convert to fraction form
   1,338.36/1,848.72 = 1,047.28/x
3. Step 3: Cross multiply
   1,338.36x = 1,848.72 × 1,047.28
4. Step 4: Simplify right side
   1,338.36x = 1,936,127.48
5. Step 5: Solve for x
   x = 1,936,127.48/1,338.36
6. Step 6: Final answer
   x = 1,446.64