Finding the Fourth Proportional to 2,420.69, 3,340.55 and 1,426.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,420.69 : 3,340.55 = 1,426.58 : x
2. Step 2: Convert to fraction form
   2,420.69/3,340.55 = 1,426.58/x
3. Step 3: Cross multiply
   2,420.69x = 3,340.55 × 1,426.58
4. Step 4: Simplify right side
   2,420.69x = 4,765,561.82
5. Step 5: Solve for x
   x = 4,765,561.82/2,420.69
6. Step 6: Final answer
   x = 1,968.68