Finding the Fourth Proportional to 1,421.41, 1,961.85 and 792.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.41 : 1,961.85 = 792.15 : x
2. Step 2: Convert to fraction form
   1,421.41/1,961.85 = 792.15/x
3. Step 3: Cross multiply
   1,421.41x = 1,961.85 × 792.15
4. Step 4: Simplify right side
   1,421.41x = 1,554,079.48
5. Step 5: Solve for x
   x = 1,554,079.48/1,421.41
6. Step 6: Final answer
   x = 1,093.34