Finding the Fourth Proportional to 507,200.50, 699,936.69 and 280,846

Step by Step Solution

1. Step 1: Write the proportion equation
   507,200.50 : 699,936.69 = 280,846 : x
2. Step 2: Convert to fraction form
   507,200.50/699,936.69 = 280,846/x
3. Step 3: Cross multiply
   507,200.50x = 699,936.69 × 280,846
4. Step 4: Simplify right side
   507,200.50x = 196,574,419,639.74
5. Step 5: Solve for x
   x = 196,574,419,639.74/507,200.50
6. Step 6: Final answer
   x = 387,567.48