Finding the Fourth Proportional to 1,404.12, 1,936.92 and 872.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.12 : 1,936.92 = 872.67 : x
2. Step 2: Convert to fraction form
   1,404.12/1,936.92 = 872.67/x
3. Step 3: Cross multiply
   1,404.12x = 1,936.92 × 872.67
4. Step 4: Simplify right side
   1,404.12x = 1,690,291.98
5. Step 5: Solve for x
   x = 1,690,291.98/1,404.12
6. Step 6: Final answer
   x = 1,203.81