Finding the Fourth Proportional to 9,234.27, 12,740.29 and 5,457.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,234.27 : 12,740.29 = 5,457.55 : x
2. Step 2: Convert to fraction form
   9,234.27/12,740.29 = 5,457.55/x
3. Step 3: Cross multiply
   9,234.27x = 12,740.29 × 5,457.55
4. Step 4: Simplify right side
   9,234.27x = 69,530,769.69
5. Step 5: Solve for x
   x = 69,530,769.69/9,234.27
6. Step 6: Final answer
   x = 7,529.64