Finding the Fourth Proportional to 2,061.04, 3,091.50 and 828.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.04 : 3,091.50 = 828.12 : x
2. Step 2: Convert to fraction form
   2,061.04/3,091.50 = 828.12/x
3. Step 3: Cross multiply
   2,061.04x = 3,091.50 × 828.12
4. Step 4: Simplify right side
   2,061.04x = 2,560,132.98
5. Step 5: Solve for x
   x = 2,560,132.98/2,061.04
6. Step 6: Final answer
   x = 1,242.16