Finding the Fourth Proportional to 6,636.89, 9,155.48 and 4,643.07

Step by Step Solution

1. Step 1: Write the proportion equation
   6,636.89 : 9,155.48 = 4,643.07 : x
2. Step 2: Convert to fraction form
   6,636.89/9,155.48 = 4,643.07/x
3. Step 3: Cross multiply
   6,636.89x = 9,155.48 × 4,643.07
4. Step 4: Simplify right side
   6,636.89x = 42,509,511.31
5. Step 5: Solve for x
   x = 42,509,511.31/6,636.89
6. Step 6: Final answer
   x = 6,405.04