Finding the Fourth Proportional to 1,279.77, 1,919.52 and 792.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279.77 : 1,919.52 = 792.69 : x
2. Step 2: Convert to fraction form
   1,279.77/1,919.52 = 792.69/x
3. Step 3: Cross multiply
   1,279.77x = 1,919.52 × 792.69
4. Step 4: Simplify right side
   1,279.77x = 1,521,584.31
5. Step 5: Solve for x
   x = 1,521,584.31/1,279.77
6. Step 6: Final answer
   x = 1,188.95