Finding the Fourth Proportional to 7,145.76, 10,723.20 and 5,193.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,145.76 : 10,723.20 = 5,193.12 : x
2. Step 2: Convert to fraction form
   7,145.76/10,723.20 = 5,193.12/x
3. Step 3: Cross multiply
   7,145.76x = 10,723.20 × 5,193.12
4. Step 4: Simplify right side
   7,145.76x = 55,686,864.38
5. Step 5: Solve for x
   x = 55,686,864.38/7,145.76
6. Step 6: Final answer
   x = 7,792.99