Finding the Fourth Proportional to 1,392.41, 1,921.69 and 833.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.41 : 1,921.69 = 833.18 : x
2. Step 2: Convert to fraction form
   1,392.41/1,921.69 = 833.18/x
3. Step 3: Cross multiply
   1,392.41x = 1,921.69 × 833.18
4. Step 4: Simplify right side
   1,392.41x = 1,601,110.51
5. Step 5: Solve for x
   x = 1,601,110.51/1,392.41
6. Step 6: Final answer
   x = 1,149.89