Finding the Fourth Proportional to 3,645.72, 5,469.96 and 2,185.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645.72 : 5,469.96 = 2,185.89 : x
2. Step 2: Convert to fraction form
   3,645.72/5,469.96 = 2,185.89/x
3. Step 3: Cross multiply
   3,645.72x = 5,469.96 × 2,185.89
4. Step 4: Simplify right side
   3,645.72x = 11,956,730.86
5. Step 5: Solve for x
   x = 11,956,730.86/3,645.72
6. Step 6: Final answer
   x = 3,279.66