Finding the Fourth Proportional to 1,788.72, 2,679.39 and 1,327.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.72 : 2,679.39 = 1,327.02 : x
2. Step 2: Convert to fraction form
   1,788.72/2,679.39 = 1,327.02/x
3. Step 3: Cross multiply
   1,788.72x = 2,679.39 × 1,327.02
4. Step 4: Simplify right side
   1,788.72x = 3,555,604.12
5. Step 5: Solve for x
   x = 3,555,604.12/1,788.72
6. Step 6: Final answer
   x = 1,987.79