Finding the Fourth Proportional to 2,064.12, 3,095.42 and 831.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.12 : 3,095.42 = 831.20 : x
2. Step 2: Convert to fraction form
   2,064.12/3,095.42 = 831.20/x
3. Step 3: Cross multiply
   2,064.12x = 3,095.42 × 831.20
4. Step 4: Simplify right side
   2,064.12x = 2,572,913.10
5. Step 5: Solve for x
   x = 2,572,913.10/2,064.12
6. Step 6: Final answer
   x = 1,246.49