Finding the Fourth Proportional to 2,057.98, 2,840.31 and 1,271.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.98 : 2,840.31 = 1,271.98 : x
2. Step 2: Convert to fraction form
   2,057.98/2,840.31 = 1,271.98/x
3. Step 3: Cross multiply
   2,057.98x = 2,840.31 × 1,271.98
4. Step 4: Simplify right side
   2,057.98x = 3,612,817.51
5. Step 5: Solve for x
   x = 3,612,817.51/2,057.98
6. Step 6: Final answer
   x = 1,755.52