Finding the Fourth Proportional to 1,674.72, 2,310.36 and 1,085.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,674.72 : 2,310.36 = 1,085.28 : x
2. Step 2: Convert to fraction form
   1,674.72/2,310.36 = 1,085.28/x
3. Step 3: Cross multiply
   1,674.72x = 2,310.36 × 1,085.28
4. Step 4: Simplify right side
   1,674.72x = 2,507,387.50
5. Step 5: Solve for x
   x = 2,507,387.50/1,674.72
6. Step 6: Final answer
   x = 1,497.20