Finding the Fourth Proportional to 1,371.86, 1,894.82 and 998.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.86 : 1,894.82 = 998.25 : x
2. Step 2: Convert to fraction form
   1,371.86/1,894.82 = 998.25/x
3. Step 3: Cross multiply
   1,371.86x = 1,894.82 × 998.25
4. Step 4: Simplify right side
   1,371.86x = 1,891,504.07
5. Step 5: Solve for x
   x = 1,891,504.07/1,371.86
6. Step 6: Final answer
   x = 1,378.79