Finding the Fourth Proportional to 1,401.92, 2,107.20 and 892.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.92 : 2,107.20 = 892.16 : x
2. Step 2: Convert to fraction form
   1,401.92/2,107.20 = 892.16/x
3. Step 3: Cross multiply
   1,401.92x = 2,107.20 × 892.16
4. Step 4: Simplify right side
   1,401.92x = 1,879,959.55
5. Step 5: Solve for x
   x = 1,879,959.55/1,401.92
6. Step 6: Final answer
   x = 1,340.99