Finding the Fourth Proportional to 2,061.36, 3,092.31 and 828.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.36 : 3,092.31 = 828.72 : x
2. Step 2: Convert to fraction form
   2,061.36/3,092.31 = 828.72/x
3. Step 3: Cross multiply
   2,061.36x = 3,092.31 × 828.72
4. Step 4: Simplify right side
   2,061.36x = 2,562,659.14
5. Step 5: Solve for x
   x = 2,562,659.14/2,061.36
6. Step 6: Final answer
   x = 1,243.19