Finding the Fourth Proportional to 12,777.27, 17,632.63 and 7,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.27 : 17,632.63 = 7,111.89 : x
2. Step 2: Convert to fraction form
   12,777.27/17,632.63 = 7,111.89/x
3. Step 3: Cross multiply
   12,777.27x = 17,632.63 × 7,111.89
4. Step 4: Simplify right side
   12,777.27x = 125,401,344.38
5. Step 5: Solve for x
   x = 125,401,344.38/12,777.27
6. Step 6: Final answer
   x = 9,814.41