Finding the Third Proportional to 122,605.50 and 258,333

Step by Step Solution

1. Step 1: Write the proportion equation
   122,605.50 : 258,333 = 258,333 : x
2. Step 2: Convert to fraction form
   122,605.50/258,333 = 258,333/x
3. Step 3: Cross multiply
   122,605.50x = 258,333 × 258,333
4. Step 4: Simplify right side
   122,605.50x = 66,735,938,889
5. Step 5: Solve for x
   x = 66,735,938,889/122,605.50
6. Step 6: Final answer
   x = 544,314.40