Finding the Fourth Proportional to 1,530.47, 2,112.03 and 831.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.47 : 2,112.03 = 831.85 : x
2. Step 2: Convert to fraction form
   1,530.47/2,112.03 = 831.85/x
3. Step 3: Cross multiply
   1,530.47x = 2,112.03 × 831.85
4. Step 4: Simplify right side
   1,530.47x = 1,756,892.16
5. Step 5: Solve for x
   x = 1,756,892.16/1,530.47
6. Step 6: Final answer
   x = 1,147.94