Finding the Third Proportional to 288,958.50 and 383,418

Step by Step Solution

1. Step 1: Write the proportion equation
   288,958.50 : 383,418 = 383,418 : x
2. Step 2: Convert to fraction form
   288,958.50/383,418 = 383,418/x
3. Step 3: Cross multiply
   288,958.50x = 383,418 × 383,418
4. Step 4: Simplify right side
   288,958.50x = 147,009,362,724
5. Step 5: Solve for x
   x = 147,009,362,724/288,958.50
6. Step 6: Final answer
   x = 508,755.97