Finding the Fourth Proportional to 1,381.79, 1,907.15 and 792.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.79 : 1,907.15 = 792.72 : x
2. Step 2: Convert to fraction form
   1,381.79/1,907.15 = 792.72/x
3. Step 3: Cross multiply
   1,381.79x = 1,907.15 × 792.72
4. Step 4: Simplify right side
   1,381.79x = 1,511,831.98
5. Step 5: Solve for x
   x = 1,511,831.98/1,381.79
6. Step 6: Final answer
   x = 1,094.11