Finding the Fourth Proportional to 1,831.76, 2,748.56 and 857.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,831.76 : 2,748.56 = 857.94 : x
2. Step 2: Convert to fraction form
   1,831.76/2,748.56 = 857.94/x
3. Step 3: Cross multiply
   1,831.76x = 2,748.56 × 857.94
4. Step 4: Simplify right side
   1,831.76x = 2,358,095.28
5. Step 5: Solve for x
   x = 2,358,095.28/1,831.76
6. Step 6: Final answer
   x = 1,287.34