Finding the Fourth Proportional to 3,529.98, 5,286.69 and 2,748.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,529.98 : 5,286.69 = 2,748.15 : x
2. Step 2: Convert to fraction form
   3,529.98/5,286.69 = 2,748.15/x
3. Step 3: Cross multiply
   3,529.98x = 5,286.69 × 2,748.15
4. Step 4: Simplify right side
   3,529.98x = 14,528,617.12
5. Step 5: Solve for x
   x = 14,528,617.12/3,529.98
6. Step 6: Final answer
   x = 4,115.78