Finding the Fourth Proportional to 1,620.43, 2,431.58 and 683.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.43 : 2,431.58 = 683.31 : x
2. Step 2: Convert to fraction form
   1,620.43/2,431.58 = 683.31/x
3. Step 3: Cross multiply
   1,620.43x = 2,431.58 × 683.31
4. Step 4: Simplify right side
   1,620.43x = 1,661,533.17
5. Step 5: Solve for x
   x = 1,661,533.17/1,620.43
6. Step 6: Final answer
   x = 1,025.37