Finding the Fourth Proportional to 1,443.05, 2,162.80 and 749.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.05 : 2,162.80 = 749.35 : x
2. Step 2: Convert to fraction form
   1,443.05/2,162.80 = 749.35/x
3. Step 3: Cross multiply
   1,443.05x = 2,162.80 × 749.35
4. Step 4: Simplify right side
   1,443.05x = 1,620,697.82
5. Step 5: Solve for x
   x = 1,620,697.82/1,443.05
6. Step 6: Final answer
   x = 1,123.11