Finding the Fourth Proportional to 1,381.88, 1,907.01 and 792.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.88 : 1,907.01 = 792.20 : x
2. Step 2: Convert to fraction form
   1,381.88/1,907.01 = 792.20/x
3. Step 3: Cross multiply
   1,381.88x = 1,907.01 × 792.20
4. Step 4: Simplify right side
   1,381.88x = 1,510,738.09
5. Step 5: Solve for x
   x = 1,510,738.09/1,381.88
6. Step 6: Final answer
   x = 1,093.25