Finding the Fourth Proportional to 2,630.16, 3,947.27 and 2,609.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,630.16 : 3,947.27 = 2,609.64 : x
2. Step 2: Convert to fraction form
   2,630.16/3,947.27 = 2,609.64/x
3. Step 3: Cross multiply
   2,630.16x = 3,947.27 × 2,609.64
4. Step 4: Simplify right side
   2,630.16x = 10,300,953.68
5. Step 5: Solve for x
   x = 10,300,953.68/2,630.16
6. Step 6: Final answer
   x = 3,916.47