Finding the Fourth Proportional to 2,715.59, 4,073.32 and 1,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.59 : 4,073.32 = 1,155.20 : x
2. Step 2: Convert to fraction form
   2,715.59/4,073.32 = 1,155.20/x
3. Step 3: Cross multiply
   2,715.59x = 4,073.32 × 1,155.20
4. Step 4: Simplify right side
   2,715.59x = 4,705,480.34
5. Step 5: Solve for x
   x = 4,705,480.34/2,715.59
6. Step 6: Final answer
   x = 1,732.76