Finding the Fourth Proportional to 3,453.39, 5,180.76 and 1,112.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,453.39 : 5,180.76 = 1,112.76 : x
2. Step 2: Convert to fraction form
   3,453.39/5,180.76 = 1,112.76/x
3. Step 3: Cross multiply
   3,453.39x = 5,180.76 × 1,112.76
4. Step 4: Simplify right side
   3,453.39x = 5,764,942.50
5. Step 5: Solve for x
   x = 5,764,942.50/3,453.39
6. Step 6: Final answer
   x = 1,669.36