Finding the Fourth Proportional to 2,140.68, 2,953.98 and 1,443

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.68 : 2,953.98 = 1,443 : x
2. Step 2: Convert to fraction form
   2,140.68/2,953.98 = 1,443/x
3. Step 3: Cross multiply
   2,140.68x = 2,953.98 × 1,443
4. Step 4: Simplify right side
   2,140.68x = 4,262,593.14
5. Step 5: Solve for x
   x = 4,262,593.14/2,140.68
6. Step 6: Final answer
   x = 1,991.23