Finding the Fourth Proportional to 1,530.50, 2,112.09 and 831.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.50 : 2,112.09 = 831.89 : x
2. Step 2: Convert to fraction form
   1,530.50/2,112.09 = 831.89/x
3. Step 3: Cross multiply
   1,530.50x = 2,112.09 × 831.89
4. Step 4: Simplify right side
   1,530.50x = 1,757,026.55
5. Step 5: Solve for x
   x = 1,757,026.55/1,530.50
6. Step 6: Final answer
   x = 1,148.01