Finding the Fourth Proportional to 2,155.42, 3,233.31 and 769.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.42 : 3,233.31 = 769.51 : x
2. Step 2: Convert to fraction form
   2,155.42/3,233.31 = 769.51/x
3. Step 3: Cross multiply
   2,155.42x = 3,233.31 × 769.51
4. Step 4: Simplify right side
   2,155.42x = 2,488,064.38
5. Step 5: Solve for x
   x = 2,488,064.38/2,155.42
6. Step 6: Final answer
   x = 1,154.33