Finding the Fourth Proportional to 9,469.48, 14,222.67 and 7,715.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,469.48 : 14,222.67 = 7,715.78 : x
2. Step 2: Convert to fraction form
   9,469.48/14,222.67 = 7,715.78/x
3. Step 3: Cross multiply
   9,469.48x = 14,222.67 × 7,715.78
4. Step 4: Simplify right side
   9,469.48x = 109,738,883.04
5. Step 5: Solve for x
   x = 109,738,883.04/9,469.48
6. Step 6: Final answer
   x = 11,588.70