Finding the Fourth Proportional to 1,628.39, 2,245.37 and 1,038.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.39 : 2,245.37 = 1,038.71 : x
2. Step 2: Convert to fraction form
   1,628.39/2,245.37 = 1,038.71/x
3. Step 3: Cross multiply
   1,628.39x = 2,245.37 × 1,038.71
4. Step 4: Simplify right side
   1,628.39x = 2,332,271.85
5. Step 5: Solve for x
   x = 2,332,271.85/1,628.39
6. Step 6: Final answer
   x = 1,432.26