Finding the Fourth Proportional to 2,763.69, 4,142.76 and 1,007.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,763.69 : 4,142.76 = 1,007.20 : x
2. Step 2: Convert to fraction form
   2,763.69/4,142.76 = 1,007.20/x
3. Step 3: Cross multiply
   2,763.69x = 4,142.76 × 1,007.20
4. Step 4: Simplify right side
   2,763.69x = 4,172,587.87
5. Step 5: Solve for x
   x = 4,172,587.87/2,763.69
6. Step 6: Final answer
   x = 1,509.79