Finding the Fourth Proportional to 1,422.30, 1,962.84 and 792.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.30 : 1,962.84 = 792.78 : x
2. Step 2: Convert to fraction form
   1,422.30/1,962.84 = 792.78/x
3. Step 3: Cross multiply
   1,422.30x = 1,962.84 × 792.78
4. Step 4: Simplify right side
   1,422.30x = 1,556,100.30
5. Step 5: Solve for x
   x = 1,556,100.30/1,422.30
6. Step 6: Final answer
   x = 1,094.07