Finding the Fourth Proportional to 1,620.04, 2,426.58 and 694.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.04 : 2,426.58 = 694.39 : x
2. Step 2: Convert to fraction form
   1,620.04/2,426.58 = 694.39/x
3. Step 3: Cross multiply
   1,620.04x = 2,426.58 × 694.39
4. Step 4: Simplify right side
   1,620.04x = 1,684,992.89
5. Step 5: Solve for x
   x = 1,684,992.89/1,620.04
6. Step 6: Final answer
   x = 1,040.09