Finding the Fourth Proportional to 1,391.91, 1,921.01 and 794.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391.91 : 1,921.01 = 794.55 : x
2. Step 2: Convert to fraction form
   1,391.91/1,921.01 = 794.55/x
3. Step 3: Cross multiply
   1,391.91x = 1,921.01 × 794.55
4. Step 4: Simplify right side
   1,391.91x = 1,526,334.52
5. Step 5: Solve for x
   x = 1,526,334.52/1,391.91
6. Step 6: Final answer
   x = 1,096.58