Finding the Fourth Proportional to 1,449.78, 2,001.96 and 1,379.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.78 : 2,001.96 = 1,379.31 : x
2. Step 2: Convert to fraction form
   1,449.78/2,001.96 = 1,379.31/x
3. Step 3: Cross multiply
   1,449.78x = 2,001.96 × 1,379.31
4. Step 4: Simplify right side
   1,449.78x = 2,761,323.45
5. Step 5: Solve for x
   x = 2,761,323.45/1,449.78
6. Step 6: Final answer
   x = 1,904.65