Finding the Fourth Proportional to 3,192.80, 4,789.58 and 1,113.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,192.80 : 4,789.58 = 1,113.53 : x
2. Step 2: Convert to fraction form
   3,192.80/4,789.58 = 1,113.53/x
3. Step 3: Cross multiply
   3,192.80x = 4,789.58 × 1,113.53
4. Step 4: Simplify right side
   3,192.80x = 5,333,311.50
5. Step 5: Solve for x
   x = 5,333,311.50/3,192.80
6. Step 6: Final answer
   x = 1,670.42