Finding the Fourth Proportional to 7,145.37, 10,720.62 and 3,196.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,145.37 : 10,720.62 = 3,196.31 : x
2. Step 2: Convert to fraction form
   7,145.37/10,720.62 = 3,196.31/x
3. Step 3: Cross multiply
   7,145.37x = 10,720.62 × 3,196.31
4. Step 4: Simplify right side
   7,145.37x = 34,266,371.31
5. Step 5: Solve for x
   x = 34,266,371.31/7,145.37
6. Step 6: Final answer
   x = 4,795.60