Finding the Fourth Proportional to 6,639.60, 9,164.52 and 4,650.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,639.60 : 9,164.52 = 4,650.69 : x
2. Step 2: Convert to fraction form
   6,639.60/9,164.52 = 4,650.69/x
3. Step 3: Cross multiply
   6,639.60x = 9,164.52 × 4,650.69
4. Step 4: Simplify right side
   6,639.60x = 42,621,341.52
5. Step 5: Solve for x
   x = 42,621,341.52/6,639.60
6. Step 6: Final answer
   x = 6,419.26