Finding the Fourth Proportional to 12,777.47, 17,632.90 and 7,112.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.47 : 17,632.90 = 7,112.09 : x
2. Step 2: Convert to fraction form
   12,777.47/17,632.90 = 7,112.09/x
3. Step 3: Cross multiply
   12,777.47x = 17,632.90 × 7,112.09
4. Step 4: Simplify right side
   12,777.47x = 125,406,859.53
5. Step 5: Solve for x
   x = 125,406,859.53/12,777.47
6. Step 6: Final answer
   x = 9,814.69