Finding the Fourth Proportional to 1,053.72, 1,453.83 and 831.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,453.83 = 831.96 : x
2. Step 2: Convert to fraction form
   1,053.72/1,453.83 = 831.96/x
3. Step 3: Cross multiply
   1,053.72x = 1,453.83 × 831.96
4. Step 4: Simplify right side
   1,053.72x = 1,209,528.41
5. Step 5: Solve for x
   x = 1,209,528.41/1,053.72
6. Step 6: Final answer
   x = 1,147.87