Finding the Fourth Proportional to 1,838.56, 2,758.52 and 851.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838.56 : 2,758.52 = 851.85 : x
2. Step 2: Convert to fraction form
   1,838.56/2,758.52 = 851.85/x
3. Step 3: Cross multiply
   1,838.56x = 2,758.52 × 851.85
4. Step 4: Simplify right side
   1,838.56x = 2,349,831.47
5. Step 5: Solve for x
   x = 2,349,831.47/1,838.56
6. Step 6: Final answer
   x = 1,278.08