Finding the Fourth Proportional to 1,370.37, 1,890.54 and 898.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.37 : 1,890.54 = 898.38 : x
2. Step 2: Convert to fraction form
   1,370.37/1,890.54 = 898.38/x
3. Step 3: Cross multiply
   1,370.37x = 1,890.54 × 898.38
4. Step 4: Simplify right side
   1,370.37x = 1,698,423.33
5. Step 5: Solve for x
   x = 1,698,423.33/1,370.37
6. Step 6: Final answer
   x = 1,239.39