Finding the Fourth Proportional to 1,421.82, 1,961.96 and 792.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.82 : 1,961.96 = 792.21 : x
2. Step 2: Convert to fraction form
   1,421.82/1,961.96 = 792.21/x
3. Step 3: Cross multiply
   1,421.82x = 1,961.96 × 792.21
4. Step 4: Simplify right side
   1,421.82x = 1,554,287.73
5. Step 5: Solve for x
   x = 1,554,287.73/1,421.82
6. Step 6: Final answer
   x = 1,093.17