Finding the Third Proportional to 831.94 and 1,810.69

Step by Step Solution

1. Step 1: Write the proportion equation
   831.94 : 1,810.69 = 1,810.69 : x
2. Step 2: Convert to fraction form
   831.94/1,810.69 = 1,810.69/x
3. Step 3: Cross multiply
   831.94x = 1,810.69 × 1,810.69
4. Step 4: Simplify right side
   831.94x = 3,278,589.22
5. Step 5: Solve for x
   x = 3,278,589.22/831.94
6. Step 6: Final answer
   x = 3,940.91