Finding the Fourth Proportional to 1,965.80, 2,959.40 and 1,697.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.80 : 2,959.40 = 1,697.96 : x
2. Step 2: Convert to fraction form
   1,965.80/2,959.40 = 1,697.96/x
3. Step 3: Cross multiply
   1,965.80x = 2,959.40 × 1,697.96
4. Step 4: Simplify right side
   1,965.80x = 5,024,942.82
5. Step 5: Solve for x
   x = 5,024,942.82/1,965.80
6. Step 6: Final answer
   x = 2,556.18