Finding the Fourth Proportional to 1,660.49, 2,290.52 and 1,038.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.49 : 2,290.52 = 1,038.41 : x
2. Step 2: Convert to fraction form
   1,660.49/2,290.52 = 1,038.41/x
3. Step 3: Cross multiply
   1,660.49x = 2,290.52 × 1,038.41
4. Step 4: Simplify right side
   1,660.49x = 2,378,498.87
5. Step 5: Solve for x
   x = 2,378,498.87/1,660.49
6. Step 6: Final answer
   x = 1,432.41