Finding the Fourth Proportional to 465,658.50, 643,096.61 and 320,840.83

Step by Step Solution

1. Step 1: Write the proportion equation
   465,658.50 : 643,096.61 = 320,840.83 : x
2. Step 2: Convert to fraction form
   465,658.50/643,096.61 = 320,840.83/x
3. Step 3: Cross multiply
   465,658.50x = 643,096.61 × 320,840.83
4. Step 4: Simplify right side
   465,658.50x = 206,331,650,122.59
5. Step 5: Solve for x
   x = 206,331,650,122.59/465,658.50
6. Step 6: Final answer
   x = 443,096.50