Finding the Fourth Proportional to 1,394.22, 1,924.73 and 1,078.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.22 : 1,924.73 = 1,078.77 : x
2. Step 2: Convert to fraction form
   1,394.22/1,924.73 = 1,078.77/x
3. Step 3: Cross multiply
   1,394.22x = 1,924.73 × 1,078.77
4. Step 4: Simplify right side
   1,394.22x = 2,076,335.59
5. Step 5: Solve for x
   x = 2,076,335.59/1,394.22
6. Step 6: Final answer
   x = 1,489.25