Finding the Fourth Proportional to 1,424.40, 1,967.40 and 1,379.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.40 : 1,967.40 = 1,379.04 : x
2. Step 2: Convert to fraction form
   1,424.40/1,967.40 = 1,379.04/x
3. Step 3: Cross multiply
   1,424.40x = 1,967.40 × 1,379.04
4. Step 4: Simplify right side
   1,424.40x = 2,713,123.30
5. Step 5: Solve for x
   x = 2,713,123.30/1,424.40
6. Step 6: Final answer
   x = 1,904.75