Finding the Fourth Proportional to 2,185.93, 3,013.35 and 1,921.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.93 : 3,013.35 = 1,921.45 : x
2. Step 2: Convert to fraction form
   2,185.93/3,013.35 = 1,921.45/x
3. Step 3: Cross multiply
   2,185.93x = 3,013.35 × 1,921.45
4. Step 4: Simplify right side
   2,185.93x = 5,790,001.36
5. Step 5: Solve for x
   x = 5,790,001.36/2,185.93
6. Step 6: Final answer
   x = 2,648.76