Finding the Fourth Proportional to 2,643.83, 3,967.56 and 2,623.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.83 : 3,967.56 = 2,623.32 : x
2. Step 2: Convert to fraction form
   2,643.83/3,967.56 = 2,623.32/x
3. Step 3: Cross multiply
   2,643.83x = 3,967.56 × 2,623.32
4. Step 4: Simplify right side
   2,643.83x = 10,408,179.50
5. Step 5: Solve for x
   x = 10,408,179.50/2,643.83
6. Step 6: Final answer
   x = 3,936.79