Finding the Fourth Proportional to 1,634.54, 2,250.72 and 1,408.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,634.54 : 2,250.72 = 1,408.55 : x
2. Step 2: Convert to fraction form
   1,634.54/2,250.72 = 1,408.55/x
3. Step 3: Cross multiply
   1,634.54x = 2,250.72 × 1,408.55
4. Step 4: Simplify right side
   1,634.54x = 3,170,240.40
5. Step 5: Solve for x
   x = 3,170,240.40/1,634.54
6. Step 6: Final answer
   x = 1,939.54