Finding the Fourth Proportional to 1,357.52, 1,872.37 and 879.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.52 : 1,872.37 = 879.09 : x
2. Step 2: Convert to fraction form
   1,357.52/1,872.37 = 879.09/x
3. Step 3: Cross multiply
   1,357.52x = 1,872.37 × 879.09
4. Step 4: Simplify right side
   1,357.52x = 1,645,977.35
5. Step 5: Solve for x
   x = 1,645,977.35/1,357.52
6. Step 6: Final answer
   x = 1,212.49