Finding the Fourth Proportional to 1,322.78, 1,824.61 and 851.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.78 : 1,824.61 = 851.29 : x
2. Step 2: Convert to fraction form
   1,322.78/1,824.61 = 851.29/x
3. Step 3: Cross multiply
   1,322.78x = 1,824.61 × 851.29
4. Step 4: Simplify right side
   1,322.78x = 1,553,258.87
5. Step 5: Solve for x
   x = 1,553,258.87/1,322.78
6. Step 6: Final answer
   x = 1,174.24