Finding the Fourth Proportional to 2,185.67, 3,279.72 and 1,636.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.67 : 3,279.72 = 1,636.22 : x
2. Step 2: Convert to fraction form
   2,185.67/3,279.72 = 1,636.22/x
3. Step 3: Cross multiply
   2,185.67x = 3,279.72 × 1,636.22
4. Step 4: Simplify right side
   2,185.67x = 5,366,343.46
5. Step 5: Solve for x
   x = 5,366,343.46/2,185.67
6. Step 6: Final answer
   x = 2,455.24