Finding the Fourth Proportional to 3,752.72, 5,627.69 and 1,286.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,752.72 : 5,627.69 = 1,286.88 : x
2. Step 2: Convert to fraction form
   3,752.72/5,627.69 = 1,286.88/x
3. Step 3: Cross multiply
   3,752.72x = 5,627.69 × 1,286.88
4. Step 4: Simplify right side
   3,752.72x = 7,242,161.71
5. Step 5: Solve for x
   x = 7,242,161.71/3,752.72
6. Step 6: Final answer
   x = 1,929.84