Finding the Fourth Proportional to 1,395.06, 1,924.89 and 805.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.06 : 1,924.89 = 805.56 : x
2. Step 2: Convert to fraction form
   1,395.06/1,924.89 = 805.56/x
3. Step 3: Cross multiply
   1,395.06x = 1,924.89 × 805.56
4. Step 4: Simplify right side
   1,395.06x = 1,550,614.39
5. Step 5: Solve for x
   x = 1,550,614.39/1,395.06
6. Step 6: Final answer
   x = 1,111.50