Finding the Fourth Proportional to 1,350.72, 2,016.52 and 1,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,350.72 : 2,016.52 = 1,155.78 : x
2. Step 2: Convert to fraction form
   1,350.72/2,016.52 = 1,155.78/x
3. Step 3: Cross multiply
   1,350.72x = 2,016.52 × 1,155.78
4. Step 4: Simplify right side
   1,350.72x = 2,330,650.60
5. Step 5: Solve for x
   x = 2,330,650.60/1,350.72
6. Step 6: Final answer
   x = 1,725.49