Finding the Fourth Proportional to 1,340.20, 1,849.60 and 868.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.20 : 1,849.60 = 868.32 : x
2. Step 2: Convert to fraction form
   1,340.20/1,849.60 = 868.32/x
3. Step 3: Cross multiply
   1,340.20x = 1,849.60 × 868.32
4. Step 4: Simplify right side
   1,340.20x = 1,606,044.67
5. Step 5: Solve for x
   x = 1,606,044.67/1,340.20
6. Step 6: Final answer
   x = 1,198.36