Finding the Fourth Proportional to 3,087.39, 4,631.37 and 1,007.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,087.39 : 4,631.37 = 1,007.31 : x
2. Step 2: Convert to fraction form
   3,087.39/4,631.37 = 1,007.31/x
3. Step 3: Cross multiply
   3,087.39x = 4,631.37 × 1,007.31
4. Step 4: Simplify right side
   3,087.39x = 4,665,225.31
5. Step 5: Solve for x
   x = 4,665,225.31/3,087.39
6. Step 6: Final answer
   x = 1,511.06