Finding the Fourth Proportional to 3,631.01, 5,447.31 and 1,439.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,631.01 : 5,447.31 = 1,439.69 : x
2. Step 2: Convert to fraction form
   3,631.01/5,447.31 = 1,439.69/x
3. Step 3: Cross multiply
   3,631.01x = 5,447.31 × 1,439.69
4. Step 4: Simplify right side
   3,631.01x = 7,842,410.50
5. Step 5: Solve for x
   x = 7,842,410.50/3,631.01
6. Step 6: Final answer
   x = 2,159.85