Finding the Fourth Proportional to 1,584.06, 2,185.98 and 921.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,584.06 : 2,185.98 = 921.29 : x
2. Step 2: Convert to fraction form
   1,584.06/2,185.98 = 921.29/x
3. Step 3: Cross multiply
   1,584.06x = 2,185.98 × 921.29
4. Step 4: Simplify right side
   1,584.06x = 2,013,921.51
5. Step 5: Solve for x
   x = 2,013,921.51/1,584.06
6. Step 6: Final answer
   x = 1,271.37