Finding the Fourth Proportional to 1,366.20, 1,885.34 and 806.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.20 : 1,885.34 = 806.69 : x
2. Step 2: Convert to fraction form
   1,366.20/1,885.34 = 806.69/x
3. Step 3: Cross multiply
   1,366.20x = 1,885.34 × 806.69
4. Step 4: Simplify right side
   1,366.20x = 1,520,880.89
5. Step 5: Solve for x
   x = 1,520,880.89/1,366.20
6. Step 6: Final answer
   x = 1,113.22