Finding the Fourth Proportional to 1,831.49, 2,528.61 and 1,271.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,831.49 : 2,528.61 = 1,271.78 : x
2. Step 2: Convert to fraction form
   1,831.49/2,528.61 = 1,271.78/x
3. Step 3: Cross multiply
   1,831.49x = 2,528.61 × 1,271.78
4. Step 4: Simplify right side
   1,831.49x = 3,215,835.63
5. Step 5: Solve for x
   x = 3,215,835.63/1,831.49
6. Step 6: Final answer
   x = 1,755.86