Finding the Fourth Proportional to 2,123.98, 3,179.79 and 1,382.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.98 : 3,179.79 = 1,382.78 : x
2. Step 2: Convert to fraction form
   2,123.98/3,179.79 = 1,382.78/x
3. Step 3: Cross multiply
   2,123.98x = 3,179.79 × 1,382.78
4. Step 4: Simplify right side
   2,123.98x = 4,396,957.97
5. Step 5: Solve for x
   x = 4,396,957.97/2,123.98
6. Step 6: Final answer
   x = 2,070.15