Finding the Fourth Proportional to 3,639.24, 5,458.72 and 1,298.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,639.24 : 5,458.72 = 1,298.69 : x
2. Step 2: Convert to fraction form
   3,639.24/5,458.72 = 1,298.69/x
3. Step 3: Cross multiply
   3,639.24x = 5,458.72 × 1,298.69
4. Step 4: Simplify right side
   3,639.24x = 7,089,185.08
5. Step 5: Solve for x
   x = 7,089,185.08/3,639.24
6. Step 6: Final answer
   x = 1,947.99