Finding the Fourth Proportional to 3,192.69, 4,791.20 and 1,112.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,192.69 : 4,791.20 = 1,112.69 : x
2. Step 2: Convert to fraction form
   3,192.69/4,791.20 = 1,112.69/x
3. Step 3: Cross multiply
   3,192.69x = 4,791.20 × 1,112.69
4. Step 4: Simplify right side
   3,192.69x = 5,331,096.37
5. Step 5: Solve for x
   x = 5,331,096.37/3,192.69
6. Step 6: Final answer
   x = 1,669.78