Finding the Fourth Proportional to 3,667.91, 5,061.73 and 1,989.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.91 : 5,061.73 = 1,989.31 : x
2. Step 2: Convert to fraction form
   3,667.91/5,061.73 = 1,989.31/x
3. Step 3: Cross multiply
   3,667.91x = 5,061.73 × 1,989.31
4. Step 4: Simplify right side
   3,667.91x = 10,069,350.11
5. Step 5: Solve for x
   x = 10,069,350.11/3,667.91
6. Step 6: Final answer
   x = 2,745.26