Finding the Fourth Proportional to 620,783.33, 930,702.83 and 321,072.80

Step by Step Solution

1. Step 1: Write the proportion equation
   620,783.33 : 930,702.83 = 321,072.80 : x
2. Step 2: Convert to fraction form
   620,783.33/930,702.83 = 321,072.80/x
3. Step 3: Cross multiply
   620,783.33x = 930,702.83 × 321,072.80
4. Step 4: Simplify right side
   620,783.33x = 298,823,357,337.15
5. Step 5: Solve for x
   x = 298,823,357,337.15/620,783.33
6. Step 6: Final answer
   x = 481,364.99