Finding the Fourth Proportional to 2,172.30, 2,998.56 and 1,426.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.30 : 2,998.56 = 1,426.42 : x
2. Step 2: Convert to fraction form
   2,172.30/2,998.56 = 1,426.42/x
3. Step 3: Cross multiply
   2,172.30x = 2,998.56 × 1,426.42
4. Step 4: Simplify right side
   2,172.30x = 4,277,205.96
5. Step 5: Solve for x
   x = 4,277,205.96/2,172.30
6. Step 6: Final answer
   x = 1,968.98