Finding the Fourth Proportional to 2,791.32, 4,187.07 and 1,329.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.32 : 4,187.07 = 1,329.72 : x
2. Step 2: Convert to fraction form
   2,791.32/4,187.07 = 1,329.72/x
3. Step 3: Cross multiply
   2,791.32x = 4,187.07 × 1,329.72
4. Step 4: Simplify right side
   2,791.32x = 5,567,630.72
5. Step 5: Solve for x
   x = 5,567,630.72/2,791.32
6. Step 6: Final answer
   x = 1,994.62