Finding the Fourth Proportional to 1,602.83, 2,399.89 and 831.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,602.83 : 2,399.89 = 831.71 : x
2. Step 2: Convert to fraction form
   1,602.83/2,399.89 = 831.71/x
3. Step 3: Cross multiply
   1,602.83x = 2,399.89 × 831.71
4. Step 4: Simplify right side
   1,602.83x = 1,996,012.51
5. Step 5: Solve for x
   x = 1,996,012.51/1,602.83
6. Step 6: Final answer
   x = 1,245.31