Finding the Fourth Proportional to 1,155.12, 1,730.52 and 900.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.12 : 1,730.52 = 900.24 : x
2. Step 2: Convert to fraction form
   1,155.12/1,730.52 = 900.24/x
3. Step 3: Cross multiply
   1,155.12x = 1,730.52 × 900.24
4. Step 4: Simplify right side
   1,155.12x = 1,557,883.32
5. Step 5: Solve for x
   x = 1,557,883.32/1,155.12
6. Step 6: Final answer
   x = 1,348.68