Finding the Fourth Proportional to 2,519.68, 3,778.04 and 764.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,519.68 : 3,778.04 = 764.15 : x
2. Step 2: Convert to fraction form
   2,519.68/3,778.04 = 764.15/x
3. Step 3: Cross multiply
   2,519.68x = 3,778.04 × 764.15
4. Step 4: Simplify right side
   2,519.68x = 2,886,985.45
5. Step 5: Solve for x
   x = 2,886,985.45/2,519.68
6. Step 6: Final answer
   x = 1,145.78