Finding the Fourth Proportional to 2,758.76, 4,130.28 and 2,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.76 : 4,130.28 = 2,499.20 : x
2. Step 2: Convert to fraction form
   2,758.76/4,130.28 = 2,499.20/x
3. Step 3: Cross multiply
   2,758.76x = 4,130.28 × 2,499.20
4. Step 4: Simplify right side
   2,758.76x = 10,322,395.78
5. Step 5: Solve for x
   x = 10,322,395.78/2,758.76
6. Step 6: Final answer
   x = 3,741.68