Finding the Fourth Proportional to 2,104.57, 2,903.36 and 1,431.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.57 : 2,903.36 = 1,431.55 : x
2. Step 2: Convert to fraction form
   2,104.57/2,903.36 = 1,431.55/x
3. Step 3: Cross multiply
   2,104.57x = 2,903.36 × 1,431.55
4. Step 4: Simplify right side
   2,104.57x = 4,156,290.59
5. Step 5: Solve for x
   x = 4,156,290.59/2,104.57
6. Step 6: Final answer
   x = 1,974.89