Finding the Fourth Proportional to 1,529.76, 2,111.10 and 831.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.76 : 2,111.10 = 831.18 : x
2. Step 2: Convert to fraction form
   1,529.76/2,111.10 = 831.18/x
3. Step 3: Cross multiply
   1,529.76x = 2,111.10 × 831.18
4. Step 4: Simplify right side
   1,529.76x = 1,754,704.10
5. Step 5: Solve for x
   x = 1,754,704.10/1,529.76
6. Step 6: Final answer
   x = 1,147.05