Finding the Fourth Proportional to 3,453.37, 5,178.76 and 1,113.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,453.37 : 5,178.76 = 1,113.98 : x
2. Step 2: Convert to fraction form
   3,453.37/5,178.76 = 1,113.98/x
3. Step 3: Cross multiply
   3,453.37x = 5,178.76 × 1,113.98
4. Step 4: Simplify right side
   3,453.37x = 5,769,006.39
5. Step 5: Solve for x
   x = 5,769,006.39/3,453.37
6. Step 6: Final answer
   x = 1,670.55