Finding the Fourth Proportional to 1,395.72, 1,926.05 and 806.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 1,926.05 = 806.13 : x
2. Step 2: Convert to fraction form
   1,395.72/1,926.05 = 806.13/x
3. Step 3: Cross multiply
   1,395.72x = 1,926.05 × 806.13
4. Step 4: Simplify right side
   1,395.72x = 1,552,642.66
5. Step 5: Solve for x
   x = 1,552,642.66/1,395.72
6. Step 6: Final answer
   x = 1,112.43