Finding the Fourth Proportional to 2,028.51, 2,799.09 and 1,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,028.51 : 2,799.09 = 1,189.50 : x
2. Step 2: Convert to fraction form
   2,028.51/2,799.09 = 1,189.50/x
3. Step 3: Cross multiply
   2,028.51x = 2,799.09 × 1,189.50
4. Step 4: Simplify right side
   2,028.51x = 3,329,517.56
5. Step 5: Solve for x
   x = 3,329,517.56/2,028.51
6. Step 6: Final answer
   x = 1,641.36