Finding the Fourth Proportional to 1,530.55, 2,112.17 and 831.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.55 : 2,112.17 = 831.92 : x
2. Step 2: Convert to fraction form
   1,530.55/2,112.17 = 831.92/x
3. Step 3: Cross multiply
   1,530.55x = 2,112.17 × 831.92
4. Step 4: Simplify right side
   1,530.55x = 1,757,152.31
5. Step 5: Solve for x
   x = 1,757,152.31/1,530.55
6. Step 6: Final answer
   x = 1,148.06