Finding the Fourth Proportional to 3,618.78, 4,994.55 and 2,126.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.78 : 4,994.55 = 2,126.69 : x
2. Step 2: Convert to fraction form
   3,618.78/4,994.55 = 2,126.69/x
3. Step 3: Cross multiply
   3,618.78x = 4,994.55 × 2,126.69
4. Step 4: Simplify right side
   3,618.78x = 10,621,859.54
5. Step 5: Solve for x
   x = 10,621,859.54/3,618.78
6. Step 6: Final answer
   x = 2,935.20