Finding the Fourth Proportional to 1,379.04, 1,898.04 and 985.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.04 : 1,898.04 = 985.44 : x
2. Step 2: Convert to fraction form
   1,379.04/1,898.04 = 985.44/x
3. Step 3: Cross multiply
   1,379.04x = 1,898.04 × 985.44
4. Step 4: Simplify right side
   1,379.04x = 1,870,404.54
5. Step 5: Solve for x
   x = 1,870,404.54/1,379.04
6. Step 6: Final answer
   x = 1,356.31