Finding the Fourth Proportional to 2,159.31, 2,979.89 and 1,374.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.31 : 2,979.89 = 1,374.42 : x
2. Step 2: Convert to fraction form
   2,159.31/2,979.89 = 1,374.42/x
3. Step 3: Cross multiply
   2,159.31x = 2,979.89 × 1,374.42
4. Step 4: Simplify right side
   2,159.31x = 4,095,620.41
5. Step 5: Solve for x
   x = 4,095,620.41/2,159.31
6. Step 6: Final answer
   x = 1,896.73