Finding the Fourth Proportional to 1,392.90, 1,921.56 and 895.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.90 : 1,921.56 = 895.38 : x
2. Step 2: Convert to fraction form
   1,392.90/1,921.56 = 895.38/x
3. Step 3: Cross multiply
   1,392.90x = 1,921.56 × 895.38
4. Step 4: Simplify right side
   1,392.90x = 1,720,526.39
5. Step 5: Solve for x
   x = 1,720,526.39/1,392.90
6. Step 6: Final answer
   x = 1,235.21