Finding the Fourth Proportional to 1,395.38, 1,925.37 and 805.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.38 : 1,925.37 = 805.70 : x
2. Step 2: Convert to fraction form
   1,395.38/1,925.37 = 805.70/x
3. Step 3: Cross multiply
   1,395.38x = 1,925.37 × 805.70
4. Step 4: Simplify right side
   1,395.38x = 1,551,270.61
5. Step 5: Solve for x
   x = 1,551,270.61/1,395.38
6. Step 6: Final answer
   x = 1,111.72