Finding the Fourth Proportional to 1,529.86, 2,111.23 and 831.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,529.86 : 2,111.23 = 831.24 : x
2. Step 2: Convert to fraction form
   1,529.86/2,111.23 = 831.24/x
3. Step 3: Cross multiply
   1,529.86x = 2,111.23 × 831.24
4. Step 4: Simplify right side
   1,529.86x = 1,754,938.83
5. Step 5: Solve for x
   x = 1,754,938.83/1,529.86
6. Step 6: Final answer
   x = 1,147.12