Finding the Fourth Proportional to 1,392.79, 1,921.58 and 794.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.79 : 1,921.58 = 794.86 : x
2. Step 2: Convert to fraction form
   1,392.79/1,921.58 = 794.86/x
3. Step 3: Cross multiply
   1,392.79x = 1,921.58 × 794.86
4. Step 4: Simplify right side
   1,392.79x = 1,527,384.47
5. Step 5: Solve for x
   x = 1,527,384.47/1,392.79
6. Step 6: Final answer
   x = 1,096.63