Finding the Fourth Proportional to 1,965.53, 2,945.61 and 1,086.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.53 : 2,945.61 = 1,086.73 : x
2. Step 2: Convert to fraction form
   1,965.53/2,945.61 = 1,086.73/x
3. Step 3: Cross multiply
   1,965.53x = 2,945.61 × 1,086.73
4. Step 4: Simplify right side
   1,965.53x = 3,201,075.39
5. Step 5: Solve for x
   x = 3,201,075.39/1,965.53
6. Step 6: Final answer
   x = 1,628.60