Finding the Fourth Proportional to 1,279.89, 1,914.98 and 791.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.89 : 1,914.98 = 791.73 : x
2. Step 2: Convert to fraction form
   1,279.89/1,914.98 = 791.73/x
3. Step 3: Cross multiply
   1,279.89x = 1,914.98 × 791.73
4. Step 4: Simplify right side
   1,279.89x = 1,516,143.16
5. Step 5: Solve for x
   x = 1,516,143.16/1,279.89
6. Step 6: Final answer
   x = 1,184.59