Finding the Fourth Proportional to 3,667.56, 5,509.98 and 2,987.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,667.56 : 5,509.98 = 2,987.88 : x
2. Step 2: Convert to fraction form
   3,667.56/5,509.98 = 2,987.88/x
3. Step 3: Cross multiply
   3,667.56x = 5,509.98 × 2,987.88
4. Step 4: Simplify right side
   3,667.56x = 16,463,159.04
5. Step 5: Solve for x
   x = 16,463,159.04/3,667.56
6. Step 6: Final answer
   x = 4,488.86