Finding the Fourth Proportional to 1,421.98, 1,962.42 and 792.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.98 : 1,962.42 = 792.64 : x
2. Step 2: Convert to fraction form
   1,421.98/1,962.42 = 792.64/x
3. Step 3: Cross multiply
   1,421.98x = 1,962.42 × 792.64
4. Step 4: Simplify right side
   1,421.98x = 1,555,492.59
5. Step 5: Solve for x
   x = 1,555,492.59/1,421.98
6. Step 6: Final answer
   x = 1,093.89