Finding the Fourth Proportional to 3,618.56, 4,994.78 and 2,782.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,618.56 : 4,994.78 = 2,782.03 : x
2. Step 2: Convert to fraction form
   3,618.56/4,994.78 = 2,782.03/x
3. Step 3: Cross multiply
   3,618.56x = 4,994.78 × 2,782.03
4. Step 4: Simplify right side
   3,618.56x = 13,895,627.80
5. Step 5: Solve for x
   x = 13,895,627.80/3,618.56
6. Step 6: Final answer
   x = 3,840.10