Finding the Fourth Proportional to 2,039.76, 2,814.78 and 1,155.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.76 : 2,814.78 = 1,155.61 : x
2. Step 2: Convert to fraction form
   2,039.76/2,814.78 = 1,155.61/x
3. Step 3: Cross multiply
   2,039.76x = 2,814.78 × 1,155.61
4. Step 4: Simplify right side
   2,039.76x = 3,252,795.77
5. Step 5: Solve for x
   x = 3,252,795.77/2,039.76
6. Step 6: Final answer
   x = 1,594.70