Finding the Fourth Proportional to 2,613.19, 3,912.77 and 1,378.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.19 : 3,912.77 = 1,378.03 : x
2. Step 2: Convert to fraction form
   2,613.19/3,912.77 = 1,378.03/x
3. Step 3: Cross multiply
   2,613.19x = 3,912.77 × 1,378.03
4. Step 4: Simplify right side
   2,613.19x = 5,391,907.55
5. Step 5: Solve for x
   x = 5,391,907.55/2,613.19
6. Step 6: Final answer
   x = 2,063.34