Finding the Fourth Proportional to 1,322.10, 1,826.06 and 879.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,322.10 : 1,826.06 = 879.21 : x
2. Step 2: Convert to fraction form
   1,322.10/1,826.06 = 879.21/x
3. Step 3: Cross multiply
   1,322.10x = 1,826.06 × 879.21
4. Step 4: Simplify right side
   1,322.10x = 1,605,485.82
5. Step 5: Solve for x
   x = 1,605,485.82/1,322.10
6. Step 6: Final answer
   x = 1,214.35