Finding the Fourth Proportional to 7,200.29, 10,810.46 and 5,720.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.29 : 10,810.46 = 5,720.42 : x
2. Step 2: Convert to fraction form
   7,200.29/10,810.46 = 5,720.42/x
3. Step 3: Cross multiply
   7,200.29x = 10,810.46 × 5,720.42
4. Step 4: Simplify right side
   7,200.29x = 61,840,412.92
5. Step 5: Solve for x
   x = 61,840,412.92/7,200.29
6. Step 6: Final answer
   x = 8,588.60