Finding the Fourth Proportional to 1,392.02, 1,920.92 and 832.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.02 : 1,920.92 = 832.15 : x
2. Step 2: Convert to fraction form
   1,392.02/1,920.92 = 832.15/x
3. Step 3: Cross multiply
   1,392.02x = 1,920.92 × 832.15
4. Step 4: Simplify right side
   1,392.02x = 1,598,503.22
5. Step 5: Solve for x
   x = 1,598,503.22/1,392.02
6. Step 6: Final answer
   x = 1,148.34