Finding the Fourth Proportional to 2,621.38, 3,617.40 and 1,426.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.38 : 3,617.40 = 1,426.31 : x
2. Step 2: Convert to fraction form
   2,621.38/3,617.40 = 1,426.31/x
3. Step 3: Cross multiply
   2,621.38x = 3,617.40 × 1,426.31
4. Step 4: Simplify right side
   2,621.38x = 5,159,533.79
5. Step 5: Solve for x
   x = 5,159,533.79/2,621.38
6. Step 6: Final answer
   x = 1,968.25