Finding the Fourth Proportional to 1,530.34, 2,111.82 and 831.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.34 : 2,111.82 = 831.71 : x
2. Step 2: Convert to fraction form
   1,530.34/2,111.82 = 831.71/x
3. Step 3: Cross multiply
   1,530.34x = 2,111.82 × 831.71
4. Step 4: Simplify right side
   1,530.34x = 1,756,421.81
5. Step 5: Solve for x
   x = 1,756,421.81/1,530.34
6. Step 6: Final answer
   x = 1,147.73