Finding the Fourth Proportional to 1,339.36, 1,848.89 and 1,007.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.36 : 1,848.89 = 1,007.87 : x
2. Step 2: Convert to fraction form
   1,339.36/1,848.89 = 1,007.87/x
3. Step 3: Cross multiply
   1,339.36x = 1,848.89 × 1,007.87
4. Step 4: Simplify right side
   1,339.36x = 1,863,434.04
5. Step 5: Solve for x
   x = 1,863,434.04/1,339.36
6. Step 6: Final answer
   x = 1,391.29