Finding the Fourth Proportional to 2,145.83, 3,217.82 and 1,323.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.83 : 3,217.82 = 1,323.90 : x
2. Step 2: Convert to fraction form
   2,145.83/3,217.82 = 1,323.90/x
3. Step 3: Cross multiply
   2,145.83x = 3,217.82 × 1,323.90
4. Step 4: Simplify right side
   2,145.83x = 4,260,065.28
5. Step 5: Solve for x
   x = 4,260,065.28/2,145.83
6. Step 6: Final answer
   x = 1,985.28