Finding the Fourth Proportional to 2,028.64, 2,799.56 and 1,243.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.64 : 2,799.56 = 1,243.12 : x
2. Step 2: Convert to fraction form
   2,028.64/2,799.56 = 1,243.12/x
3. Step 3: Cross multiply
   2,028.64x = 2,799.56 × 1,243.12
4. Step 4: Simplify right side
   2,028.64x = 3,480,189.03
5. Step 5: Solve for x
   x = 3,480,189.03/2,028.64
6. Step 6: Final answer
   x = 1,715.53