Finding the Fourth Proportional to 2,144.68, 3,215.85 and 2,002.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.68 : 3,215.85 = 2,002.30 : x
2. Step 2: Convert to fraction form
   2,144.68/3,215.85 = 2,002.30/x
3. Step 3: Cross multiply
   2,144.68x = 3,215.85 × 2,002.30
4. Step 4: Simplify right side
   2,144.68x = 6,439,096.46
5. Step 5: Solve for x
   x = 6,439,096.46/2,144.68
6. Step 6: Final answer
   x = 3,002.36