Finding the Fourth Proportional to 1,351.89, 1,864.33 and 879.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.89 : 1,864.33 = 879.29 : x
2. Step 2: Convert to fraction form
   1,351.89/1,864.33 = 879.29/x
3. Step 3: Cross multiply
   1,351.89x = 1,864.33 × 879.29
4. Step 4: Simplify right side
   1,351.89x = 1,639,277.40
5. Step 5: Solve for x
   x = 1,639,277.40/1,351.89
6. Step 6: Final answer
   x = 1,212.59