Finding the Fourth Proportional to 2,621.64, 3,933.98 and 1,323.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.64 : 3,933.98 = 1,323.21 : x
2. Step 2: Convert to fraction form
   2,621.64/3,933.98 = 1,323.21/x
3. Step 3: Cross multiply
   2,621.64x = 3,933.98 × 1,323.21
4. Step 4: Simplify right side
   2,621.64x = 5,205,475.06
5. Step 5: Solve for x
   x = 5,205,475.06/2,621.64
6. Step 6: Final answer
   x = 1,985.58