Finding the Fourth Proportional to 2,106.86, 3,157.93 and 789.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.86 : 3,157.93 = 789.34 : x
2. Step 2: Convert to fraction form
   2,106.86/3,157.93 = 789.34/x
3. Step 3: Cross multiply
   2,106.86x = 3,157.93 × 789.34
4. Step 4: Simplify right side
   2,106.86x = 2,492,676.52
5. Step 5: Solve for x
   x = 2,492,676.52/2,106.86
6. Step 6: Final answer
   x = 1,183.13