Finding the Fourth Proportional to 1,617.71, 2,426.69 and 693.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.71 : 2,426.69 = 693.09 : x
2. Step 2: Convert to fraction form
   1,617.71/2,426.69 = 693.09/x
3. Step 3: Cross multiply
   1,617.71x = 2,426.69 × 693.09
4. Step 4: Simplify right side
   1,617.71x = 1,681,916.30
5. Step 5: Solve for x
   x = 1,681,916.30/1,617.71
6. Step 6: Final answer
   x = 1,039.69