Finding the Fourth Proportional to 2,776.40, 4,145.28 and 2,499.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.40 : 4,145.28 = 2,499.92 : x
2. Step 2: Convert to fraction form
   2,776.40/4,145.28 = 2,499.92/x
3. Step 3: Cross multiply
   2,776.40x = 4,145.28 × 2,499.92
4. Step 4: Simplify right side
   2,776.40x = 10,362,868.38
5. Step 5: Solve for x
   x = 10,362,868.38/2,776.40
6. Step 6: Final answer
   x = 3,732.48