Finding the Fourth Proportional to 2,105.63, 3,156.44 and 789.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.63 : 3,156.44 = 789.03 : x
2. Step 2: Convert to fraction form
   2,105.63/3,156.44 = 789.03/x
3. Step 3: Cross multiply
   2,105.63x = 3,156.44 × 789.03
4. Step 4: Simplify right side
   2,105.63x = 2,490,525.85
5. Step 5: Solve for x
   x = 2,490,525.85/2,105.63
6. Step 6: Final answer
   x = 1,182.79