Finding the Fourth Proportional to 2,878.38, 4,317.34 and 769.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,878.38 : 4,317.34 = 769.84 : x
2. Step 2: Convert to fraction form
   2,878.38/4,317.34 = 769.84/x
3. Step 3: Cross multiply
   2,878.38x = 4,317.34 × 769.84
4. Step 4: Simplify right side
   2,878.38x = 3,323,661.03
5. Step 5: Solve for x
   x = 3,323,661.03/2,878.38
6. Step 6: Final answer
   x = 1,154.70