Finding the Fourth Proportional to 1,395.97, 1,926.30 and 806.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.97 : 1,926.30 = 806.70 : x
2. Step 2: Convert to fraction form
   1,395.97/1,926.30 = 806.70/x
3. Step 3: Cross multiply
   1,395.97x = 1,926.30 × 806.70
4. Step 4: Simplify right side
   1,395.97x = 1,553,946.21
5. Step 5: Solve for x
   x = 1,553,946.21/1,395.97
6. Step 6: Final answer
   x = 1,113.17