Finding the Fourth Proportional to 1,355.00, 1,870.25 and 831.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.00 : 1,870.25 = 831.47 : x
2. Step 2: Convert to fraction form
   1,355.00/1,870.25 = 831.47/x
3. Step 3: Cross multiply
   1,355.00x = 1,870.25 × 831.47
4. Step 4: Simplify right side
   1,355.00x = 1,555,043.26
5. Step 5: Solve for x
   x = 1,555,043.26/1,355.00
6. Step 6: Final answer
   x = 1,147.64