Finding the Fourth Proportional to 2,155.29, 3,234.15 and 1,059.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.29 : 3,234.15 = 1,059.77 : x
2. Step 2: Convert to fraction form
   2,155.29/3,234.15 = 1,059.77/x
3. Step 3: Cross multiply
   2,155.29x = 3,234.15 × 1,059.77
4. Step 4: Simplify right side
   2,155.29x = 3,427,438.97
5. Step 5: Solve for x
   x = 3,427,438.97/2,155.29
6. Step 6: Final answer
   x = 1,590.24