Finding the Fourth Proportional to 2,557.39, 3,529.06 and 1,438.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.39 : 3,529.06 = 1,438.37 : x
2. Step 2: Convert to fraction form
   2,557.39/3,529.06 = 1,438.37/x
3. Step 3: Cross multiply
   2,557.39x = 3,529.06 × 1,438.37
4. Step 4: Simplify right side
   2,557.39x = 5,076,094.03
5. Step 5: Solve for x
   x = 5,076,094.03/2,557.39
6. Step 6: Final answer
   x = 1,984.87