Finding the Fourth Proportional to 1,443.14, 2,164.81 and 621.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.14 : 2,164.81 = 621.46 : x
2. Step 2: Convert to fraction form
   1,443.14/2,164.81 = 621.46/x
3. Step 3: Cross multiply
   1,443.14x = 2,164.81 × 621.46
4. Step 4: Simplify right side
   1,443.14x = 1,345,342.82
5. Step 5: Solve for x
   x = 1,345,342.82/1,443.14
6. Step 6: Final answer
   x = 932.23