Finding the Fourth Proportional to 2,174.57, 3,003.40 and 1,431.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.57 : 3,003.40 = 1,431.85 : x
2. Step 2: Convert to fraction form
   2,174.57/3,003.40 = 1,431.85/x
3. Step 3: Cross multiply
   2,174.57x = 3,003.40 × 1,431.85
4. Step 4: Simplify right side
   2,174.57x = 4,300,407.20
5. Step 5: Solve for x
   x = 4,300,407.20/2,174.57
6. Step 6: Final answer
   x = 1,977.59