Finding the Fourth Proportional to 1,530.56, 2,112.20 and 831.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.56 : 2,112.20 = 831.94 : x
2. Step 2: Convert to fraction form
   1,530.56/2,112.20 = 831.94/x
3. Step 3: Cross multiply
   1,530.56x = 2,112.20 × 831.94
4. Step 4: Simplify right side
   1,530.56x = 1,757,208.95
5. Step 5: Solve for x
   x = 1,757,208.95/1,530.56
6. Step 6: Final answer
   x = 1,148.08