Finding the Fourth Proportional to 1,395.18, 1,925.37 and 805.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.18 : 1,925.37 = 805.80 : x
2. Step 2: Convert to fraction form
   1,395.18/1,925.37 = 805.80/x
3. Step 3: Cross multiply
   1,395.18x = 1,925.37 × 805.80
4. Step 4: Simplify right side
   1,395.18x = 1,551,463.15
5. Step 5: Solve for x
   x = 1,551,463.15/1,395.18
6. Step 6: Final answer
   x = 1,112.02