Finding the Fourth Proportional to 1,388.73, 1,913.82 and 995.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.73 : 1,913.82 = 995.07 : x
2. Step 2: Convert to fraction form
   1,388.73/1,913.82 = 995.07/x
3. Step 3: Cross multiply
   1,388.73x = 1,913.82 × 995.07
4. Step 4: Simplify right side
   1,388.73x = 1,904,388.31
5. Step 5: Solve for x
   x = 1,904,388.31/1,388.73
6. Step 6: Final answer
   x = 1,371.31