Finding the Fourth Proportional to 2,420.96, 3,340.86 and 1,426.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.96 : 3,340.86 = 1,426.31 : x
2. Step 2: Convert to fraction form
   2,420.96/3,340.86 = 1,426.31/x
3. Step 3: Cross multiply
   2,420.96x = 3,340.86 × 1,426.31
4. Step 4: Simplify right side
   2,420.96x = 4,765,085.32
5. Step 5: Solve for x
   x = 4,765,085.32/2,420.96
6. Step 6: Final answer
   x = 1,968.26