Finding the Fourth Proportional to 2,639.48, 3,959.55 and 973.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.48 : 3,959.55 = 973.71 : x
2. Step 2: Convert to fraction form
   2,639.48/3,959.55 = 973.71/x
3. Step 3: Cross multiply
   2,639.48x = 3,959.55 × 973.71
4. Step 4: Simplify right side
   2,639.48x = 3,855,453.43
5. Step 5: Solve for x
   x = 3,855,453.43/2,639.48
6. Step 6: Final answer
   x = 1,460.69