Finding the Fourth Proportional to 1,422.17, 1,962.42 and 792.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.17 : 1,962.42 = 792.60 : x
2. Step 2: Convert to fraction form
   1,422.17/1,962.42 = 792.60/x
3. Step 3: Cross multiply
   1,422.17x = 1,962.42 × 792.60
4. Step 4: Simplify right side
   1,422.17x = 1,555,414.09
5. Step 5: Solve for x
   x = 1,555,414.09/1,422.17
6. Step 6: Final answer
   x = 1,093.69