Finding the Fourth Proportional to 3,390.85, 5,084.31 and 1,050.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.85 : 5,084.31 = 1,050.23 : x
2. Step 2: Convert to fraction form
   3,390.85/5,084.31 = 1,050.23/x
3. Step 3: Cross multiply
   3,390.85x = 5,084.31 × 1,050.23
4. Step 4: Simplify right side
   3,390.85x = 5,339,694.89
5. Step 5: Solve for x
   x = 5,339,694.89/3,390.85
6. Step 6: Final answer
   x = 1,574.74