Finding the Fourth Proportional to 3,454.20, 5,179.72 and 1,113.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,454.20 : 5,179.72 = 1,113.48 : x
2. Step 2: Convert to fraction form
   3,454.20/5,179.72 = 1,113.48/x
3. Step 3: Cross multiply
   3,454.20x = 5,179.72 × 1,113.48
4. Step 4: Simplify right side
   3,454.20x = 5,767,514.63
5. Step 5: Solve for x
   x = 5,767,514.63/3,454.20
6. Step 6: Final answer
   x = 1,669.71