Finding the Fourth Proportional to 6,411.52, 9,618.63 and 3,639.52

Step by Step Solution

1. Step 1: Write the proportion equation
   6,411.52 : 9,618.63 = 3,639.52 : x
2. Step 2: Convert to fraction form
   6,411.52/9,618.63 = 3,639.52/x
3. Step 3: Cross multiply
   6,411.52x = 9,618.63 × 3,639.52
4. Step 4: Simplify right side
   6,411.52x = 35,007,196.26
5. Step 5: Solve for x
   x = 35,007,196.26/6,411.52
6. Step 6: Final answer
   x = 5,460.05