Finding the Fourth Proportional to 2,509.82, 3,463.45 and 1,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,509.82 : 3,463.45 = 1,390.69 : x
2. Step 2: Convert to fraction form
   2,509.82/3,463.45 = 1,390.69/x
3. Step 3: Cross multiply
   2,509.82x = 3,463.45 × 1,390.69
4. Step 4: Simplify right side
   2,509.82x = 4,816,585.28
5. Step 5: Solve for x
   x = 4,816,585.28/2,509.82
6. Step 6: Final answer
   x = 1,919.10