Finding the Fourth Proportional to 2,488.02, 3,728.72 and 1,317.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.02 : 3,728.72 = 1,317.78 : x
2. Step 2: Convert to fraction form
   2,488.02/3,728.72 = 1,317.78/x
3. Step 3: Cross multiply
   2,488.02x = 3,728.72 × 1,317.78
4. Step 4: Simplify right side
   2,488.02x = 4,913,632.64
5. Step 5: Solve for x
   x = 4,913,632.64/2,488.02
6. Step 6: Final answer
   x = 1,974.92