Finding the Fourth Proportional to 1,965.91, 2,712.73 and 1,219.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.91 : 2,712.73 = 1,219.59 : x
2. Step 2: Convert to fraction form
   1,965.91/2,712.73 = 1,219.59/x
3. Step 3: Cross multiply
   1,965.91x = 2,712.73 × 1,219.59
4. Step 4: Simplify right side
   1,965.91x = 3,308,435.07
5. Step 5: Solve for x
   x = 3,308,435.07/1,965.91
6. Step 6: Final answer
   x = 1,682.90