Finding the Fourth Proportional to 1,392.08, 1,920.56 and 832.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.08 : 1,920.56 = 832.56 : x
2. Step 2: Convert to fraction form
   1,392.08/1,920.56 = 832.56/x
3. Step 3: Cross multiply
   1,392.08x = 1,920.56 × 832.56
4. Step 4: Simplify right side
   1,392.08x = 1,598,977.27
5. Step 5: Solve for x
   x = 1,598,977.27/1,392.08
6. Step 6: Final answer
   x = 1,148.63