Finding the Fourth Proportional to 1,366.49, 1,885.70 and 806.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.49 : 1,885.70 = 806.99 : x
2. Step 2: Convert to fraction form
   1,366.49/1,885.70 = 806.99/x
3. Step 3: Cross multiply
   1,366.49x = 1,885.70 × 806.99
4. Step 4: Simplify right side
   1,366.49x = 1,521,727.58
5. Step 5: Solve for x
   x = 1,521,727.58/1,366.49
6. Step 6: Final answer
   x = 1,113.61