Finding the Fourth Proportional to 1,965.89, 2,713.56 and 1,259.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.89 : 2,713.56 = 1,259.64 : x
2. Step 2: Convert to fraction form
   1,965.89/2,713.56 = 1,259.64/x
3. Step 3: Cross multiply
   1,965.89x = 2,713.56 × 1,259.64
4. Step 4: Simplify right side
   1,965.89x = 3,418,108.72
5. Step 5: Solve for x
   x = 3,418,108.72/1,965.89
6. Step 6: Final answer
   x = 1,738.71