Finding the Fourth Proportional to 1,392.48, 1,921.96 and 950.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.48 : 1,921.96 = 950.56 : x
2. Step 2: Convert to fraction form
   1,392.48/1,921.96 = 950.56/x
3. Step 3: Cross multiply
   1,392.48x = 1,921.96 × 950.56
4. Step 4: Simplify right side
   1,392.48x = 1,826,938.30
5. Step 5: Solve for x
   x = 1,826,938.30/1,392.48
6. Step 6: Final answer
   x = 1,312.00