Finding the Fourth Proportional to 3,667.72, 5,061.36 and 1,989.08

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.72 : 5,061.36 = 1,989.08 : x
2. Step 2: Convert to fraction form
   3,667.72/5,061.36 = 1,989.08/x
3. Step 3: Cross multiply
   3,667.72x = 5,061.36 × 1,989.08
4. Step 4: Simplify right side
   3,667.72x = 10,067,449.95
5. Step 5: Solve for x
   x = 10,067,449.95/3,667.72
6. Step 6: Final answer
   x = 2,744.88