Finding the Fourth Proportional to 2,309.96, 3,187.37 and 1,426.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.96 : 3,187.37 = 1,426.05 : x
2. Step 2: Convert to fraction form
   2,309.96/3,187.37 = 1,426.05/x
3. Step 3: Cross multiply
   2,309.96x = 3,187.37 × 1,426.05
4. Step 4: Simplify right side
   2,309.96x = 4,545,352.55
5. Step 5: Solve for x
   x = 4,545,352.55/2,309.96
6. Step 6: Final answer
   x = 1,967.72