Finding the Fourth Proportional to 1,421.87, 1,961.98 and 792.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.87 : 1,961.98 = 792.43 : x
2. Step 2: Convert to fraction form
   1,421.87/1,961.98 = 792.43/x
3. Step 3: Cross multiply
   1,421.87x = 1,961.98 × 792.43
4. Step 4: Simplify right side
   1,421.87x = 1,554,724.93
5. Step 5: Solve for x
   x = 1,554,724.93/1,421.87
6. Step 6: Final answer
   x = 1,093.43