Finding the Fourth Proportional to 1,815.75, 2,719.32 and 1,155.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.75 : 2,719.32 = 1,155.27 : x
2. Step 2: Convert to fraction form
   1,815.75/2,719.32 = 1,155.27/x
3. Step 3: Cross multiply
   1,815.75x = 2,719.32 × 1,155.27
4. Step 4: Simplify right side
   1,815.75x = 3,141,548.82
5. Step 5: Solve for x
   x = 3,141,548.82/1,815.75
6. Step 6: Final answer
   x = 1,730.17