Finding the Fourth Proportional to 1,530.45, 2,112.02 and 831.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.45 : 2,112.02 = 831.83 : x
2. Step 2: Convert to fraction form
   1,530.45/2,112.02 = 831.83/x
3. Step 3: Cross multiply
   1,530.45x = 2,112.02 × 831.83
4. Step 4: Simplify right side
   1,530.45x = 1,756,837.92
5. Step 5: Solve for x
   x = 1,756,837.92/1,530.45
6. Step 6: Final answer
   x = 1,147.92