Finding the Fourth Proportional to 2,143.05, 3,215.43 and 756.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.05 : 3,215.43 = 756.53 : x
2. Step 2: Convert to fraction form
   2,143.05/3,215.43 = 756.53/x
3. Step 3: Cross multiply
   2,143.05x = 3,215.43 × 756.53
4. Step 4: Simplify right side
   2,143.05x = 2,432,553.18
5. Step 5: Solve for x
   x = 2,432,553.18/2,143.05
6. Step 6: Final answer
   x = 1,135.09