Finding the Fourth Proportional to 2,630.61, 3,943.83 and 1,313.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.61 : 3,943.83 = 1,313.69 : x
2. Step 2: Convert to fraction form
   2,630.61/3,943.83 = 1,313.69/x
3. Step 3: Cross multiply
   2,630.61x = 3,943.83 × 1,313.69
4. Step 4: Simplify right side
   2,630.61x = 5,180,950.31
5. Step 5: Solve for x
   x = 5,180,950.31/2,630.61
6. Step 6: Final answer
   x = 1,969.49