Finding the Fourth Proportional to 1,395.68, 1,926.30 and 806.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.68 : 1,926.30 = 806.48 : x
2. Step 2: Convert to fraction form
   1,395.68/1,926.30 = 806.48/x
3. Step 3: Cross multiply
   1,395.68x = 1,926.30 × 806.48
4. Step 4: Simplify right side
   1,395.68x = 1,553,522.42
5. Step 5: Solve for x
   x = 1,553,522.42/1,395.68
6. Step 6: Final answer
   x = 1,113.09