Finding the Fourth Proportional to 1,382.20, 1,907.42 and 792.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.20 : 1,907.42 = 792.72 : x
2. Step 2: Convert to fraction form
   1,382.20/1,907.42 = 792.72/x
3. Step 3: Cross multiply
   1,382.20x = 1,907.42 × 792.72
4. Step 4: Simplify right side
   1,382.20x = 1,512,046.02
5. Step 5: Solve for x
   x = 1,512,046.02/1,382.20
6. Step 6: Final answer
   x = 1,093.94