Finding the Fourth Proportional to 2,139.23, 3,211.27 and 1,436.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.23 : 3,211.27 = 1,436.96 : x
2. Step 2: Convert to fraction form
   2,139.23/3,211.27 = 1,436.96/x
3. Step 3: Cross multiply
   2,139.23x = 3,211.27 × 1,436.96
4. Step 4: Simplify right side
   2,139.23x = 4,614,466.54
5. Step 5: Solve for x
   x = 4,614,466.54/2,139.23
6. Step 6: Final answer
   x = 2,157.07