Finding the Fourth Proportional to 3,689.83, 5,534.79 and 1,057.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,689.83 : 5,534.79 = 1,057.42 : x
2. Step 2: Convert to fraction form
   3,689.83/5,534.79 = 1,057.42/x
3. Step 3: Cross multiply
   3,689.83x = 5,534.79 × 1,057.42
4. Step 4: Simplify right side
   3,689.83x = 5,852,597.64
5. Step 5: Solve for x
   x = 5,852,597.64/3,689.83
6. Step 6: Final answer
   x = 1,586.14