Finding the Fourth Proportional to 1,443.41, 2,165.10 and 1,200.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.41 : 2,165.10 = 1,200.11 : x
2. Step 2: Convert to fraction form
   1,443.41/2,165.10 = 1,200.11/x
3. Step 3: Cross multiply
   1,443.41x = 2,165.10 × 1,200.11
4. Step 4: Simplify right side
   1,443.41x = 2,598,347.34
5. Step 5: Solve for x
   x = 2,598,347.34/1,443.41
6. Step 6: Final answer
   x = 1,800.15