Finding the Fourth Proportional to 1,969.89, 2,719.83 and 1,308.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.89 : 2,719.83 = 1,308.12 : x
2. Step 2: Convert to fraction form
   1,969.89/2,719.83 = 1,308.12/x
3. Step 3: Cross multiply
   1,969.89x = 2,719.83 × 1,308.12
4. Step 4: Simplify right side
   1,969.89x = 3,557,864.02
5. Step 5: Solve for x
   x = 3,557,864.02/1,969.89
6. Step 6: Final answer
   x = 1,806.12