Finding the Fourth Proportional to 1,617.51, 2,426.28 and 1,328.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,617.51 : 2,426.28 = 1,328.34 : x
2. Step 2: Convert to fraction form
   1,617.51/2,426.28 = 1,328.34/x
3. Step 3: Cross multiply
   1,617.51x = 2,426.28 × 1,328.34
4. Step 4: Simplify right side
   1,617.51x = 3,222,924.78
5. Step 5: Solve for x
   x = 3,222,924.78/1,617.51
6. Step 6: Final answer
   x = 1,992.52