Finding the Fourth Proportional to 2,483.76, 3,728.28 and 1,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,483.76 : 3,728.28 = 1,388.72 : x
2. Step 2: Convert to fraction form
   2,483.76/3,728.28 = 1,388.72/x
3. Step 3: Cross multiply
   2,483.76x = 3,728.28 × 1,388.72
4. Step 4: Simplify right side
   2,483.76x = 5,177,537.00
5. Step 5: Solve for x
   x = 5,177,537.00/2,483.76
6. Step 6: Final answer
   x = 2,084.56