Finding the Fourth Proportional to 2,457.72, 3,683.52 and 1,287.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.72 : 3,683.52 = 1,287.12 : x
2. Step 2: Convert to fraction form
   2,457.72/3,683.52 = 1,287.12/x
3. Step 3: Cross multiply
   2,457.72x = 3,683.52 × 1,287.12
4. Step 4: Simplify right side
   2,457.72x = 4,741,132.26
5. Step 5: Solve for x
   x = 4,741,132.26/2,457.72
6. Step 6: Final answer
   x = 1,929.08