Finding the Fourth Proportional to 7,142.50, 10,715.34 and 3,447.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.50 : 10,715.34 = 3,447.82 : x
2. Step 2: Convert to fraction form
   7,142.50/10,715.34 = 3,447.82/x
3. Step 3: Cross multiply
   7,142.50x = 10,715.34 × 3,447.82
4. Step 4: Simplify right side
   7,142.50x = 36,944,563.56
5. Step 5: Solve for x
   x = 36,944,563.56/7,142.50
6. Step 6: Final answer
   x = 5,172.50