Finding the Fourth Proportional to 2,039.96, 2,815.30 and 1,155.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.96 : 2,815.30 = 1,155.86 : x
2. Step 2: Convert to fraction form
   2,039.96/2,815.30 = 1,155.86/x
3. Step 3: Cross multiply
   2,039.96x = 2,815.30 × 1,155.86
4. Step 4: Simplify right side
   2,039.96x = 3,254,092.66
5. Step 5: Solve for x
   x = 3,254,092.66/2,039.96
6. Step 6: Final answer
   x = 1,595.17