Finding the Fourth Proportional to 2,715.05, 4,061.43 and 2,168.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.05 : 4,061.43 = 2,168.30 : x
2. Step 2: Convert to fraction form
   2,715.05/4,061.43 = 2,168.30/x
3. Step 3: Cross multiply
   2,715.05x = 4,061.43 × 2,168.30
4. Step 4: Simplify right side
   2,715.05x = 8,806,398.67
5. Step 5: Solve for x
   x = 8,806,398.67/2,715.05
6. Step 6: Final answer
   x = 3,243.55