Finding the Fourth Proportional to 1,392.79, 1,921.47 and 895.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.79 : 1,921.47 = 895.72 : x
2. Step 2: Convert to fraction form
   1,392.79/1,921.47 = 895.72/x
3. Step 3: Cross multiply
   1,392.79x = 1,921.47 × 895.72
4. Step 4: Simplify right side
   1,392.79x = 1,721,099.11
5. Step 5: Solve for x
   x = 1,721,099.11/1,392.79
6. Step 6: Final answer
   x = 1,235.72