Finding the Fourth Proportional to 3,791.34, 5,689.31 and 1,328.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,791.34 : 5,689.31 = 1,328.00 : x
2. Step 2: Convert to fraction form
   3,791.34/5,689.31 = 1,328.00/x
3. Step 3: Cross multiply
   3,791.34x = 5,689.31 × 1,328.00
4. Step 4: Simplify right side
   3,791.34x = 7,555,368.59
5. Step 5: Solve for x
   x = 7,555,368.59/3,791.34
6. Step 6: Final answer
   x = 1,992.80