Finding the Fourth Proportional to 645,868.50, 969,036.03 and 202,636.50

Step by Step Solution

1. Step 1: Write the proportion equation
   645,868.50 : 969,036.03 = 202,636.50 : x
2. Step 2: Convert to fraction form
   645,868.50/969,036.03 = 202,636.50/x
3. Step 3: Cross multiply
   645,868.50x = 969,036.03 × 202,636.50
4. Step 4: Simplify right side
   645,868.50x = 196,362,069,493.10
5. Step 5: Solve for x
   x = 196,362,069,493.10/645,868.50
6. Step 6: Final answer
   x = 304,027.94