Finding the Fourth Proportional to 1,443.07, 2,162.71 and 620.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.07 : 2,162.71 = 620.35 : x
2. Step 2: Convert to fraction form
   1,443.07/2,162.71 = 620.35/x
3. Step 3: Cross multiply
   1,443.07x = 2,162.71 × 620.35
4. Step 4: Simplify right side
   1,443.07x = 1,341,637.15
5. Step 5: Solve for x
   x = 1,341,637.15/1,443.07
6. Step 6: Final answer
   x = 929.71