Finding the Fourth Proportional to 1,192.72, 1,788.72 and 326.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,192.72 : 1,788.72 = 326.92 : x
2. Step 2: Convert to fraction form
   1,192.72/1,788.72 = 326.92/x
3. Step 3: Cross multiply
   1,192.72x = 1,788.72 × 326.92
4. Step 4: Simplify right side
   1,192.72x = 584,768.34
5. Step 5: Solve for x
   x = 584,768.34/1,192.72
6. Step 6: Final answer
   x = 490.28