Finding the Fourth Proportional to 2,690.32, 4,007.73 and 2,608.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,690.32 : 4,007.73 = 2,608.71 : x
2. Step 2: Convert to fraction form
   2,690.32/4,007.73 = 2,608.71/x
3. Step 3: Cross multiply
   2,690.32x = 4,007.73 × 2,608.71
4. Step 4: Simplify right side
   2,690.32x = 10,455,005.33
5. Step 5: Solve for x
   x = 10,455,005.33/2,690.32
6. Step 6: Final answer
   x = 3,886.16