Finding the Fourth Proportional to 2,715.58, 4,072.86 and 1,155.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.58 : 4,072.86 = 1,155.30 : x
2. Step 2: Convert to fraction form
   2,715.58/4,072.86 = 1,155.30/x
3. Step 3: Cross multiply
   2,715.58x = 4,072.86 × 1,155.30
4. Step 4: Simplify right side
   2,715.58x = 4,705,375.16
5. Step 5: Solve for x
   x = 4,705,375.16/2,715.58
6. Step 6: Final answer
   x = 1,732.73