Finding the Fourth Proportional to 1,392.52, 1,921.55 and 832.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.52 : 1,921.55 = 832.88 : x
2. Step 2: Convert to fraction form
   1,392.52/1,921.55 = 832.88/x
3. Step 3: Cross multiply
   1,392.52x = 1,921.55 × 832.88
4. Step 4: Simplify right side
   1,392.52x = 1,600,420.56
5. Step 5: Solve for x
   x = 1,600,420.56/1,392.52
6. Step 6: Final answer
   x = 1,149.30