Finding the Fourth Proportional to 3,698.52, 5,546.18 and 1,389.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,698.52 : 5,546.18 = 1,389.40 : x
2. Step 2: Convert to fraction form
   3,698.52/5,546.18 = 1,389.40/x
3. Step 3: Cross multiply
   3,698.52x = 5,546.18 × 1,389.40
4. Step 4: Simplify right side
   3,698.52x = 7,705,862.49
5. Step 5: Solve for x
   x = 7,705,862.49/3,698.52
6. Step 6: Final answer
   x = 2,083.50