Finding the Fourth Proportional to 12,828.48, 17,707.98 and 7,527.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,828.48 : 17,707.98 = 7,527.72 : x
2. Step 2: Convert to fraction form
   12,828.48/17,707.98 = 7,527.72/x
3. Step 3: Cross multiply
   12,828.48x = 17,707.98 × 7,527.72
4. Step 4: Simplify right side
   12,828.48x = 133,300,715.21
5. Step 5: Solve for x
   x = 133,300,715.21/12,828.48
6. Step 6: Final answer
   x = 10,391.00