Finding the Fourth Proportional to 1,395.63, 1,926.18 and 806.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.63 : 1,926.18 = 806.15 : x
2. Step 2: Convert to fraction form
   1,395.63/1,926.18 = 806.15/x
3. Step 3: Cross multiply
   1,395.63x = 1,926.18 × 806.15
4. Step 4: Simplify right side
   1,395.63x = 1,552,794.82
5. Step 5: Solve for x
   x = 1,552,794.82/1,395.63
6. Step 6: Final answer
   x = 1,112.61