Finding the Fourth Proportional to 1,155.28, 1,730.76 and 605.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.28 : 1,730.76 = 605.56 : x
2. Step 2: Convert to fraction form
   1,155.28/1,730.76 = 605.56/x
3. Step 3: Cross multiply
   1,155.28x = 1,730.76 × 605.56
4. Step 4: Simplify right side
   1,155.28x = 1,048,079.03
5. Step 5: Solve for x
   x = 1,048,079.03/1,155.28
6. Step 6: Final answer
   x = 907.21