Finding the Fourth Proportional to 1,612.40, 2,429.58 and 1,326.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,612.40 : 2,429.58 = 1,326.31 : x
2. Step 2: Convert to fraction form
   1,612.40/2,429.58 = 1,326.31/x
3. Step 3: Cross multiply
   1,612.40x = 2,429.58 × 1,326.31
4. Step 4: Simplify right side
   1,612.40x = 3,222,376.25
5. Step 5: Solve for x
   x = 3,222,376.25/1,612.40
6. Step 6: Final answer
   x = 1,998.50