Finding the Fourth Proportional to 2,647.31, 3,972.81 and 2,626.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,647.31 : 3,972.81 = 2,626.82 : x
2. Step 2: Convert to fraction form
   2,647.31/3,972.81 = 2,626.82/x
3. Step 3: Cross multiply
   2,647.31x = 3,972.81 × 2,626.82
4. Step 4: Simplify right side
   2,647.31x = 10,435,856.76
5. Step 5: Solve for x
   x = 10,435,856.76/2,647.31
6. Step 6: Final answer
   x = 3,942.06