Finding the Fourth Proportional to 1,423.20, 1,964.01 and 793.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.20 : 1,964.01 = 793.78 : x
2. Step 2: Convert to fraction form
   1,423.20/1,964.01 = 793.78/x
3. Step 3: Cross multiply
   1,423.20x = 1,964.01 × 793.78
4. Step 4: Simplify right side
   1,423.20x = 1,558,991.86
5. Step 5: Solve for x
   x = 1,558,991.86/1,423.20
6. Step 6: Final answer
   x = 1,095.42