Finding the Fourth Proportional to 3,756.78, 5,628.99 and 1,290.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,756.78 : 5,628.99 = 1,290.24 : x
2. Step 2: Convert to fraction form
   3,756.78/5,628.99 = 1,290.24/x
3. Step 3: Cross multiply
   3,756.78x = 5,628.99 × 1,290.24
4. Step 4: Simplify right side
   3,756.78x = 7,262,748.06
5. Step 5: Solve for x
   x = 7,262,748.06/3,756.78
6. Step 6: Final answer
   x = 1,933.24