Finding the Fourth Proportional to 2,028.72, 2,799.72 and 1,330.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.72 : 2,799.72 = 1,330.80 : x
2. Step 2: Convert to fraction form
   2,028.72/2,799.72 = 1,330.80/x
3. Step 3: Cross multiply
   2,028.72x = 2,799.72 × 1,330.80
4. Step 4: Simplify right side
   2,028.72x = 3,725,867.38
5. Step 5: Solve for x
   x = 3,725,867.38/2,028.72
6. Step 6: Final answer
   x = 1,836.56