Finding the Fourth Proportional to 2,268.12, 3,129.72 and 1,273.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,268.12 : 3,129.72 = 1,273.40 : x
2. Step 2: Convert to fraction form
   2,268.12/3,129.72 = 1,273.40/x
3. Step 3: Cross multiply
   2,268.12x = 3,129.72 × 1,273.40
4. Step 4: Simplify right side
   2,268.12x = 3,985,385.45
5. Step 5: Solve for x
   x = 3,985,385.45/2,268.12
6. Step 6: Final answer
   x = 1,757.13