Finding the Fourth Proportional to 2,185.38, 3,011.72 and 1,555.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.38 : 3,011.72 = 1,555.92 : x
2. Step 2: Convert to fraction form
   2,185.38/3,011.72 = 1,555.92/x
3. Step 3: Cross multiply
   2,185.38x = 3,011.72 × 1,555.92
4. Step 4: Simplify right side
   2,185.38x = 4,685,995.38
5. Step 5: Solve for x
   x = 4,685,995.38/2,185.38
6. Step 6: Final answer
   x = 2,144.25