Finding the Fourth Proportional to 1,083.71, 1,624.04 and 620.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.71 : 1,624.04 = 620.79 : x
2. Step 2: Convert to fraction form
   1,083.71/1,624.04 = 620.79/x
3. Step 3: Cross multiply
   1,083.71x = 1,624.04 × 620.79
4. Step 4: Simplify right side
   1,083.71x = 1,008,184.69
5. Step 5: Solve for x
   x = 1,008,184.69/1,083.71
6. Step 6: Final answer
   x = 930.31