Finding the Fourth Proportional to 2,639.27, 3,959.47 and 973.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.27 : 3,959.47 = 973.40 : x
2. Step 2: Convert to fraction form
   2,639.27/3,959.47 = 973.40/x
3. Step 3: Cross multiply
   2,639.27x = 3,959.47 × 973.40
4. Step 4: Simplify right side
   2,639.27x = 3,854,151.79
5. Step 5: Solve for x
   x = 3,854,151.79/2,639.27
6. Step 6: Final answer
   x = 1,460.31