Finding the Fourth Proportional to 645,867, 969,033.78 and 202,635

Step by Step Solution

1. Step 1: Write the proportion equation
   645,867 : 969,033.78 = 202,635 : x
2. Step 2: Convert to fraction form
   645,867/969,033.78 = 202,635/x
3. Step 3: Cross multiply
   645,867x = 969,033.78 × 202,635
4. Step 4: Simplify right side
   645,867x = 196,360,160,010.30
5. Step 5: Solve for x
   x = 196,360,160,010.30/645,867
6. Step 6: Final answer
   x = 304,025.69