Finding the Fourth Proportional to 1,392.51, 2,087.25 and 844.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.51 : 2,087.25 = 844.55 : x
2. Step 2: Convert to fraction form
   1,392.51/2,087.25 = 844.55/x
3. Step 3: Cross multiply
   1,392.51x = 2,087.25 × 844.55
4. Step 4: Simplify right side
   1,392.51x = 1,762,772.33
5. Step 5: Solve for x
   x = 1,762,772.33/1,392.51
6. Step 6: Final answer
   x = 1,265.90