Finding the Fourth Proportional to 2,171.53, 2,997.98 and 1,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.53 : 2,997.98 = 1,426.78 : x
2. Step 2: Convert to fraction form
   2,171.53/2,997.98 = 1,426.78/x
3. Step 3: Cross multiply
   2,171.53x = 2,997.98 × 1,426.78
4. Step 4: Simplify right side
   2,171.53x = 4,277,457.90
5. Step 5: Solve for x
   x = 4,277,457.90/2,171.53
6. Step 6: Final answer
   x = 1,969.79