Finding the Fourth Proportional to 2,156.54, 3,235.23 and 769.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.54 : 3,235.23 = 769.91 : x
2. Step 2: Convert to fraction form
   2,156.54/3,235.23 = 769.91/x
3. Step 3: Cross multiply
   2,156.54x = 3,235.23 × 769.91
4. Step 4: Simplify right side
   2,156.54x = 2,490,819.75
5. Step 5: Solve for x
   x = 2,490,819.75/2,156.54
6. Step 6: Final answer
   x = 1,155.01